How long is the flight from London to Washington, D.C. Dulles Intl Airport?

For as low as £484, TAP AIR PORTUGAL can have you in Washington, D.C. Dulles Intl Airport from London in 10h 55m. London and Washington, D.C. Dulles Intl Airport are separated by a distance of 3684 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

What are the cheapest airlines flying from London to Washington, D.C. Dulles Intl Airport round-trip?

Our cheapest airline available from London to Washington, D.C. Dulles Intl Airport is Icelandair. Our recent data shows that you can find tickets from as low as £289 on this airline. Additional options worth looking into are TAP AIR PORTUGAL and Virgin Atlantic, starting at £346 and £408 round-trip. Users have found that Icelandair is 47% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from London to Washington, D.C. Dulles Intl Airport one-way?

The cheapest airline one-way is British Airways, with whom users have recently found tickets for as low as £319. However, be on the lookout for offers from Finnair and Aer Lingus, as they are both options that can get you from London to Washington, D.C. Dulles Intl Airport for a low price.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

What are the most popular routes from London to Washington, D.C. Dulles Intl Airport?

The most popular flight routes from London to Washington, D.C. Dulles Intl Airport are London Heathrow - Washington, D.C. Dulles Intl, London Gatwick - Washington, D.C. Dulles Intl and London City - Washington, D.C. Dulles Intl.

What are the cheapest flights from London to Washington, D.C. Dulles Intl Airport?

On average you can expect to pay £1,432 for a flight from London to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £343 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at £337.

What are the most reliable airlines from London to Washington, D.C. Dulles Intl Airport?

Before booking your flight to Washington, D.C. Dulles Intl Airport from London, check out the most reliable airlines to get you to your destination on time: Air Canada (79%), Austrian Airlines (79%), Copa Airlines( 79%).

What are the most popular airlines that fly from London to Washington, D.C. Dulles Intl Airport?

The most popular airlines flying from London to Washington, D.C. Dulles Intl Airport are Virgin Atlantic, British Airways and Lufthansa. Something to consider prior to booking your flight.

Can I find deals for flights from London to Dulles Intl that include hotel bookings?

Yes. In addition to deals on London to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from London to Dulles Intl?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Dulles Intl.

Can I find deals for business class flights from London to Dulles Intl?

Yes. Cheapflights offers flight deals from London to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£367+ Cheap Flights from London to Washington, D.C. Dulles Intl Airport

Cheapflights Tip: The best prices from London to Washington, D.C. Dulles Intl are usually found in March or September, booked 84 days in advance, depart on a Friday or Wednesday and return on a Tuesday

Cheap flight deals from London to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

Cheapest flights from London to Dulles Intl
Explore the most affordable flight options available from London to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 October 2026.

Mon 14/1220:35 -

1 stop26h 55m

Mon 21/1219:40 -

1 stop18h 50m

Deal found 6/10£399

Thu 19/1106:00 -

1 stop14h 15m

Sat 5/1217:25 -

1 stop17h 05m

Deal found 7/10£401

Thu 26/1106:45 -

2 stops16h 45m

Mon 30/1119:40 -

2 stops21h 15m

Deal found 5/10£403

Mon 9/1111:55 -

1 stop11h 35m

Sat 21/1119:40 -

1 stop10h 15m

Deal found 7/10£404

Fri 11/1220:35 -

1 stop26h 55m

Tue 22/1219:40 -

1 stop10h 10m

Deal found 6/10£405

Wed 16/1211:55 -

1 stop11h 35m

Tue 22/1219:40 -

1 stop10h 15m

Deal found 5/10£405

Sun 13/1220:35 -

1 stop26h 55m

Tue 22/1219:40 -

1 stop10h 10m

Deal found 6/10£406

Sun 13/1220:35 -

1 stop26h 55m

Mon 21/1219:40 -

1 stop18h 50m

Deal found 3/10£407

Mon 14/1220:35 -

1 stop26h 55m

Tue 22/1219:40 -

1 stop10h 10m

Deal found 5/10£407

Mon 9/1111:55 -

1 stop11h 35m

Sun 15/1119:40 -

1 stop10h 15m

Deal found 7/10£408

Wed 25/1107:15 -

2 stops16h 15m

Mon 30/1119:40 -

2 stops21h 15m

Deal found 3/10£408

Thu 12/1119:55 -

1 stop29h 35m

Thu 26/1117:25 -

1 stop19h 05m

Deal found 5/10£410

Best flights from London to Dulles Intl
Discover carefully curated flight deals from London to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 October 2026.

Thu 19/1110:10 -

2 stops39h 20m

Mon 7/1217:25 -

1 stop11h 25m

Deal found 3/10£463

Tue 24/1121:30 -

1 stop23h 50m

Tue 1/1217:50 -

1 stop22h 00m

Deal found 6/10£466

Sat 7/1106:30 -

1 stop14h 25m

Sun 15/1118:55 -

Nonstop7h 25m

Deal found 7/10£472

Wed 18/1110:00 -

1 stop10h 55m

Sun 6/1217:35 -

1 stop9h 35m

Deal found 3/10£484

Wed 2/1209:00 -

1 stop13h 00m

Sun 6/1222:15 -

Nonstop7h 35m

Deal found 6/10£496

Tue 2/307:45 -

2 stops14h 45m

Tue 9/317:45 -

1 stop9h 25m

Deal found 5/10£496

Mon 9/1116:20 -

Nonstop8h 55m

Sat 21/1117:29 -

1 stop33h 26m

Deal found 6/10£529

Tue 3/1119:05 -

1 stop25h 25m

Tue 10/1117:25 -

1 stop14h 25m

Deal found 3/10£537

Fri 13/1116:25 -

Nonstop8h 30m

Sun 22/1118:05 -

Nonstop7h 10m

Deal found 5/10£543

Wed 23/1211:55 -

1 stop11h 35m

Sun 27/1219:40 -

1 stop10h 15m

Deal found 6/10£590

Tue 24/1117:20 -

1 stop23h 25m

Mon 30/1113:30 -

1 stop21h 50m

Deal found 6/10£733

Tue 24/1121:20 -

2 stops46h 55m

Tue 1/1217:25 -

1 stop11h 25m

Deal found 6/10£464

Mon 8/221:30 -

1 stop23h 50m

Sat 20/217:50 -

1 stop14h 55m

Deal found 7/10£469

Sat 7/1108:40 -

1 stop12h 15m

Sat 14/1118:20 -

1 stop11h 10m

Deal found 7/10£472

Fri 20/1109:20 -

1 stop11h 35m

Mon 7/1218:15 -

1 stop9h 35m

Deal found 3/10£485

Tue 24/1109:20 -

1 stop11h 25m

Tue 1/1217:45 -

1 stop9h 25m

Deal found 6/10£501

Thu 17/1209:00 -

1 stop13h 00m

Sat 9/122:15 -

Nonstop7h 35m

Deal found 5/10£516

Wed 11/1121:30 -

1 stop23h 50m

Sat 28/1117:50 -

1 stop14h 55m

Deal found 7/10£474

Sat 21/1113:05 -

Nonstop8h 40m

Tue 1/1218:55 -

Nonstop7h 25m

Deal found 6/10£487

Thu 12/1112:15 -

Nonstop8h 25m

Sun 22/1121:45 -

Nonstop7h 15m

Deal found 5/10£543

Wed 4/1110:00 -

1 stop14h 20m

Wed 11/1107:25 -

2 stops20h 35m

Deal found 4/10£505

Wed 2/1216:35 -

1 stop27h 40m

Sun 6/1222:30 -

1 stop12h 15m

Deal found 7/10£505

Wed 18/1110:00 -

1 stop10h 55m

Tue 8/1217:45 -

1 stop9h 25m

Deal found 3/10£516

Sat 21/1112:15 -

2 stops31h 15m

Sun 29/1116:30 -

2 stops16h 40m

Deal found 4/10£489

Thu 19/1110:00 -

1 stop11h 30m

Sat 5/1221:30 -

1 stop13h 15m

Deal found 7/10£489

Wed 23/1216:25 -

Nonstop8h 30m

Wed 6/118:05 -

Nonstop7h 10m

Deal found 4/10£553

Sat 21/1106:00 -

1 stop14h 15m

Mon 7/1217:25 -

1 stop14h 15m

Deal found 3/10£506

Wed 4/1109:20 -

1 stop11h 35m

Wed 11/1118:15 -

1 stop9h 35m

Deal found 4/10£516

Wed 23/1208:40 -

1 stop12h 15m

Sat 16/118:15 -

1 stop14h 00m

Deal found 4/10£491

Tue 24/1119:40 -

1 stop25h 40m

Tue 1/1217:50 -

1 stop12h 00m

Deal found 6/10£564

Find flight deals from London to Dulles Intl

Round-trip from	£399
One-way from	£367
Popular in	April
Cheapest in	March
Average price	£549
Good round-trip deal	£440 or less
Good one-way deal	£373 or less

Icelandair
14/12-21/12
2 total stops
45h 45m total
London to Washington, D.C.

Search Deals

27/12-31/12
3 total stops
39h 20m total
London to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 0% potential increase in price (£1 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 0% potential price decrease (£3 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 2026

Search Deals

Price to beat on a round-trip flight from London (LON) to Washington, D.C. Dulles Intl.

Search Deals

Price to beat on a one-way flight from London (LON) to Washington, D.C. Dulles Intl.

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from London to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonWashington, D.C.

LHR London Heathrow - IAD Washington, D.C. Dulles Intl

LHRIAD

London Heathrow

Sun 6/12

09:55-17:34

1 stop12h 39m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£370

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Thu 10/12

11:00-21:29

1 stop15h 29m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£371

LondonWashington, D.C.

LHR London Heathrow - IAD Washington, D.C. Dulles Intl

LHRIAD

London Heathrow

Thu 5/11

20:50-20:30

2 stops28h 40m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£372

LondonWashington, D.C.

LTN London Luton - IAD Washington, D.C. Dulles Intl

LTNIAD

London Luton

Sun 8/11

14:05-18:30

3 stops33h 25m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£373

LondonWashington, D.C.

STN London Stansted - IAD Washington, D.C. Dulles Intl

STNIAD

London Stansted

Sat 12/12

06:35-19:20

2 stops17h 45m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£373

LondonWashington, D.C.

LHR London Heathrow - IAD Washington, D.C. Dulles Intl

LHRIAD

London Heathrow

Wed 4/11

20:50-15:15

2 stops23h 25m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£376

LondonWashington, D.C.

LTN London Luton - IAD Washington, D.C. Dulles Intl

LTNIAD

London Luton

Mon 26/10

16:00-15:45

3 stops51h 45m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£378

LondonWashington, D.C.

STN London Stansted - IAD Washington, D.C. Dulles Intl

STNIAD

London Stansted

Sun 3/1

07:20-13:50

2 stops59h 30m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£389

LondonWashington, D.C.

LTN London Luton - IAD Washington, D.C. Dulles Intl

LTNIAD

London Luton

Wed 16/12

17:00-15:45

1 stop27h 45m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£392

LondonWashington, D.C.

STN London Stansted - IAD Washington, D.C. Dulles Intl

STNIAD

London Stansted

Mon 19/10

10:05-20:35

3 stops39h 30m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£404

Flights are sorted by cheapest return flights first.

Deals found on 6/10

Showing 1-10 of 60 resultsSorted by cheapest first

...

Best time to book a flight from London to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from London with our price prediction graph.

LON-IAD

LHR-IAD

LGW-IAD

LCY-IAD

STN-IAD

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London to Washington, D.C. Dulles Intl Airport

LON-IAD

LHR-IAD

LGW-IAD

LCY-IAD

STN-IAD

What is the cheapest month to book a flight from London to Washington, D.C. Dulles Intl Airport?

Currently, February is the cheapest month in which you can book a flight from London to Washington, D.C. Dulles Intl Airport (average of £494). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £587). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LON to IAD?

When flying from London to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from London to Washington, D.C. Dulles Intl Airport

The most flights from LON to IAD are scheduled on a Wednesday (31 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (23 on average).

How much does it cost for a return flight from London to Washington, D.C. Dulles Intl Airport?

Airfare is below average for this route at the moment.

London to Washington, D.C. Dulles Intl Airport flights typically cost between £445 and £597 in December.
The cheapest return price found within the last 5 days was £399 on Icelandair (14 Dec–21 Dec).

What’s the top stopover airport for flights from London to Washington, D.C. Dulles Intl Airport?

Dublin (DUB) – chosen by Cheapflights users on 39% of one-stop itineraries from London to Washington, D.C. Dulles Intl Airport on Cheapflights.

What’s the cheapest stopover airport for flights from London to Washington, D.C. Dulles Intl Airport?

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £431.

What’s the fastest stopover option from London to Washington, D.C. Dulles Intl Airport?

Flights via Amsterdam (AMS) have the shortest average one-way travel time for one-stop routes: 11h 00m.

Which airport typically offers the quickest stopover for flights from London to Washington, D.C. Dulles Intl Airport?

Flights via Amsterdam (AMS) offer the fastest connection on this route, with an average stopover time of 1h 12m.

How often are flights from London to Washington, D.C. delayed?

About 16% of weekly flights between London and Washington, D.C. have experienced delays in the past year, with the average delay time being 140 minutes.

What is the most punctual flight time for London to Washington, D.C. flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Washington, D.C. flights?

Over the past year, United Airlines have had the lowest number of delays on this route, with just 10% of flights being delayed.

How far ahead should I book a flight from London to Washington, D.C. Dulles Intl Airport?

The best time to book flights from London to Washington, D.C. Dulles Intl Airport is 47 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Dulles Intl

Read through reviews of airlines operating flights from London to Washington, D.C. Dulles Intl Airport, such as United Airlines,Virgin Atlantic, andAer Lingus. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

10,303 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

United Airlines

7.4

Good

10,303 reviews

United Airlines

7.4

Good

10,303 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Virgin Atlantic

7.4

Good

693 reviews

United Airlines

7.4

Good

10,303 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Aer Lingus

7.3

Good

1,818 reviews

United Airlines

7.4

Good

10,303 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Lufthansa

6.8

Okay

8,266 reviews

United Airlines

7.4

Good

10,303 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

British Airways

6.7

Okay

8,246 reviews

United Airlines

7.4

Good

10,303 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

How long is the flight from London to Washington, D.C. Dulles Intl Airport?
For as low as £484, TAP AIR PORTUGAL can have you in Washington, D.C. Dulles Intl Airport from London in 10h 55m. London and Washington, D.C. Dulles Intl Airport are separated by a distance of 3684 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines flying from London to Washington, D.C. Dulles Intl Airport round-trip?
Our cheapest airline available from London to Washington, D.C. Dulles Intl Airport is Icelandair. Our recent data shows that you can find tickets from as low as £289 on this airline. Additional options worth looking into are TAP AIR PORTUGAL and Virgin Atlantic, starting at £346 and £408 round-trip. Users have found that Icelandair is 47% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from London to Washington, D.C. Dulles Intl Airport one-way?
The cheapest airline one-way is British Airways, with whom users have recently found tickets for as low as £319. However, be on the lookout for offers from Finnair and Aer Lingus, as they are both options that can get you from London to Washington, D.C. Dulles Intl Airport for a low price.
What are the most popular routes from London to Washington, D.C. Dulles Intl Airport?
The most popular flight routes from London to Washington, D.C. Dulles Intl Airport are London Heathrow - Washington, D.C. Dulles Intl, London Gatwick - Washington, D.C. Dulles Intl and London City - Washington, D.C. Dulles Intl.
What are the most reliable airlines from London to Washington, D.C. Dulles Intl Airport?
Before booking your flight to Washington, D.C. Dulles Intl Airport from London, check out the most reliable airlines to get you to your destination on time: Air Canada (79%), Austrian Airlines (79%), Copa Airlines( 79%).
What are the cheapest flights from London to Washington, D.C. Dulles Intl Airport?
On average you can expect to pay £1,432 for a flight from London to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £343 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at £337.
Can I find deals for flights from London to Dulles Intl that include hotel bookings?
Yes. In addition to deals on London to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from London to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Dulles Intl.
Can I find deals for business class flights from London to Dulles Intl?
Yes. Cheapflights offers flight deals from London to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London to Washington, D.C. Dulles Intl Airport?
Currently, February is the cheapest month in which you can book a flight from London to Washington, D.C. Dulles Intl Airport (average of £494). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £587). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Silver Spring

Alexandria

Gaithersburg

Oxon Hill

Hanover

Woodbridge

Glen Burnie

Springfield

Sterling

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Fly from London to Dulles Intl on these airlines

Virgin Atlantic flights from London to Washington, D.C. Dulles Intl

British Airways flights from London to Washington, D.C. Dulles Intl

Top 10 airlines flying from London to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£289	Average£429	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
TAP AIR PORTUGAL	Cheapest£346	Average£457	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Virgin Atlantic	Cheapest£408	Average£560	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Air France	Cheapest£414	Average£638	FlexibilityNo cancel fee	On-time77%	Search Air France flights
British Airways	Cheapest£414	Average£571	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Lufthansa	Cheapest£414	Average£566	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Scandinavian Airlines	Cheapest£415	Average£489	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Aer Lingus	Cheapest£416	Average£609	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Iberia	Cheapest£421	Average£537	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
Finnair	Cheapest£424	Average£595	FlexibilityNo cancel fee	On-time76%	Search Finnair flights

Fly with Cheapflights

How does Cheapflights help users find flights from London to Dulles Intl?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Dulles Intl from London today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from London to Dulles Intl?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from London to Dulles Intl.

Can Cheapflights find flights from London to Dulles Intl with no change fees?

Certainly. Search results for flights to Dulles Intl from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from London to Dulles Intl become cheaper?

Of course! You can now track prices for flights from London to Dulles Intl and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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Cheap flights from London to Washington, D.C. Dulles Intl Airport from £367

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from London to Dulles Intl

Cheapest flights from London to Dulles IntlExplore the most affordable flight options available from London to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 October 2026.

Explore the most affordable flight options available from London to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 October 2026.

Best flights from London to Dulles IntlDiscover carefully curated flight deals from London to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 October 2026.

Discover carefully curated flight deals from London to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 October 2026.

Direct flights from London to Dulles IntlExplore direct flight options from London to Dulles Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 8 October 2026.

Explore direct flight options from London to Dulles Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 8 October 2026.

Last-minute flights from London to Dulles IntlDiscover last-minute flight deals from London to Dulles Intl. Data last updated 8 October 2026 and is based on user searches.

Discover last-minute flight deals from London to Dulles Intl. Data last updated 8 October 2026 and is based on user searches.

One-way flights from London to Dulles IntlSearch for one-way flight options from London to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 8 October 2026.

Search for one-way flight options from London to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 8 October 2026.

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Cheapflights Fare Finder

Use the filters below to find and compare flights from London to Washington, D.C. Dulles Intl Airport that are best for you.

Best time to book a flight from London to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from London with our price prediction graph.

Cheapflights Insights

What is the cheapest month to book a flight from London to Washington, D.C. Dulles Intl Airport?

What is the cheapest time of day to fly from LON to IAD?

Find hourly flight availability from London to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 8 October 2026.

When flying from London to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from London to Washington, D.C. Dulles Intl Airport

Explore weekly flight availability from London to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 8 October 2026.

The most flights from LON to IAD are scheduled on a Wednesday (31 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (23 on average).

How much does it cost for a return flight from London to Washington, D.C. Dulles Intl Airport?

Airfare is below average for this route at the moment.

London to Washington, D.C. Dulles Intl Airport flights typically cost between £445 and £597 in December.The cheapest return price found within the last 5 days was £399 on Icelandair (14 Dec–21 Dec).

What’s the top stopover airport for flights from London to Washington, D.C. Dulles Intl Airport?

Share of one-stop return flights from London to Washington, D.C. Dulles Intl Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Dublin (DUB) – chosen by Cheapflights users on 39% of one-stop itineraries from London to Washington, D.C. Dulles Intl Airport on Cheapflights.

What’s the cheapest stopover airport for flights from London to Washington, D.C. Dulles Intl Airport?

Average return fare for one-stop flights from London to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £431.

What’s the fastest stopover option from London to Washington, D.C. Dulles Intl Airport?

Shortest average travel time for one-stop one-way flights from London to Washington, D.C. Dulles Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Amsterdam (AMS) have the shortest average one-way travel time for one-stop routes: 11h 00m.

Which airport typically offers the quickest stopover for flights from London to Washington, D.C. Dulles Intl Airport?

Average stopover duration for one-stop one-way flights from London to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Amsterdam (AMS) offer the fastest connection on this route, with an average stopover time of 1h 12m.

How often are flights from London to Washington, D.C. delayed?

About 16% of weekly flights between London and Washington, D.C. have experienced delays in the past year, with the average delay time being 140 minutes.

What is the most punctual flight time for London to Washington, D.C. flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Washington, D.C. flights?

Over the past year, United Airlines have had the lowest number of delays on this route, with just 10% of flights being delayed.

How far ahead should I book a flight from London to Washington, D.C. Dulles Intl Airport?

The best time to book flights from London to Washington, D.C. Dulles Intl Airport is 47 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Dulles Intl

Read through reviews of airlines operating flights from London to Washington, D.C. Dulles Intl Airport, such as United Airlines,Virgin Atlantic, andAer Lingus. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

How long is the flight from London to Washington, D.C. Dulles Intl Airport?

What are the cheapest airlines flying from London to Washington, D.C. Dulles Intl Airport round-trip?

What are the cheapest airlines to fly from London to Washington, D.C. Dulles Intl Airport one-way?

What are the most popular routes from London to Washington, D.C. Dulles Intl Airport?

What are the most reliable airlines from London to Washington, D.C. Dulles Intl Airport?

What are the cheapest flights from London to Washington, D.C. Dulles Intl Airport?

Can I find deals for flights from London to Dulles Intl that include hotel bookings?

How can I find direct flights from London to Dulles Intl?

Can I find deals for business class flights from London to Dulles Intl?

What is the cheapest month to book a flight from London to Washington, D.C. Dulles Intl Airport?

Travelling to a place near Washington, D.C. Dulles Intl Airport?

Browse thousands of different options on Cheapflights for your next trip

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Fly from London to Dulles Intl on these airlines

Choose from the following airlines for your flight from London to Dulles Intl. Flights are based on user searches made on Cheapflights and were last updated on 8 October 2026.

Alternative routes for London to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Dulles Intl by adding a car hire and/or hotel booking to your travel itinerary.

Cheapest flights from London to Dulles Intl
Explore the most affordable flight options available from London to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 October 2026.

Best flights from London to Dulles Intl
Discover carefully curated flight deals from London to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 October 2026.

Direct flights from London to Dulles Intl
Explore direct flight options from London to Dulles Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 8 October 2026.

Last-minute flights from London to Dulles Intl
Discover last-minute flight deals from London to Dulles Intl. Data last updated 8 October 2026 and is based on user searches.

One-way flights from London to Dulles Intl
Search for one-way flight options from London to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 8 October 2026.

London to Washington, D.C. Dulles Intl Airport flights typically cost between £445 and £597 in December.
The cheapest return price found within the last 5 days was £399 on Icelandair (14 Dec–21 Dec).