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

For as low as £483, TAP AIR PORTUGAL can have you in Washington, D.C. Dulles Intl Airport from London in 11h 30m. London and Washington, D.C. Dulles Intl Airport are separated by a distance of 3683 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 £286 on this airline. Additional options worth looking into are TAP AIR PORTUGAL and Virgin Atlantic, starting at £342 and £401 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 £334. 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 £992 for a flight from London to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £365 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at £263.

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 (75%), Austrian Airlines (75%), Copa Airlines( 75%).

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.

£389+ 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 January, 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 10 November 2026.

Fri 25/1212:15 -

1 stop11h 15m

Sat 30/119:40 -

1 stop10h 10m

Deal found 7/11£405

Wed 16/1216:20 -

Nonstop8h 55m

Fri 23/406:00 -

1 stop10h 25m

Deal found 7/11£406

Tue 1/1220:35 -

1 stop26h 55m

Thu 10/1219:40 -

1 stop18h 50m

Deal found 9/11£406

Sun 13/1220:35 -

1 stop26h 55m

Tue 5/119:40 -

1 stop18h 50m

Deal found 6/11£409

Sun 13/1220:35 -

1 stop26h 55m

Fri 8/119:40 -

1 stop18h 50m

Deal found 5/11£410

Wed 11/1118:30 -

1 stop25h 45m

Mon 11/117:25 -

1 stop23h 10m

Deal found 8/11£411

Thu 12/1106:00 -

1 stop14h 15m

Mon 16/1117:25 -

1 stop23h 10m

Deal found 5/11£412

Thu 10/1212:15 -

1 stop11h 15m

Wed 6/119:40 -

1 stop10h 10m

Deal found 6/11£412

Wed 18/1118:30 -

1 stop25h 45m

Tue 1/1217:25 -

1 stop24h 15m

Deal found 9/11£414

Wed 18/1116:35 -

1 stop27h 40m

Sun 29/1122:30 -

1 stop12h 15m

Deal found 6/11£416

Thu 3/1212:15 -

1 stop11h 15m

Sun 13/1219:40 -

1 stop10h 10m

Deal found 8/11£417

Mon 23/1111:55 -

1 stop11h 35m

Fri 25/1219:40 -

1 stop10h 15m

Deal found 7/11£417

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 10 November 2026.

Mon 15/216:35 -

1 stop27h 05m

Tue 23/217:25 -

1 stop17h 20m

Deal found 8/11£433

Wed 31/315:40 -

1 stop32h 40m

Wed 7/420:30 -

1 stop13h 10m

Deal found 5/11£439

Sun 21/210:00 -

1 stop11h 30m

Thu 25/212:50 -

2 stops15h 10m

Deal found 8/11£483

Mon 19/409:50 -

1 stop10h 55m

Tue 4/522:25 -

Nonstop7h 25m

Deal found 5/11£486

Mon 15/210:00 -

1 stop10h 55m

Tue 23/210:45 -

2 stops16h 10m

Deal found 7/11£492

Wed 16/1213:45 -

1 stop32h 15m

Wed 6/117:28 -

2 stops17h 52m

Deal found 7/11£512

Wed 31/310:05 -

1 stop10h 25m

Thu 8/417:25 -

1 stop9h 30m

Deal found 9/11£543

Sat 26/1208:40 -

1 stop12h 15m

Sun 10/118:40 -

1 stop10h 50m

Deal found 5/11£545

Thu 4/217:20 -

1 stop31h 05m

Thu 18/213:30 -

1 stop21h 50m

Deal found 9/11£723

Mon 1/316:35 -

1 stop27h 05m

Thu 29/416:40 -

2 stops22h 45m

Deal found 5/11£483

Sun 31/119:40 -

1 stop25h 05m

Sun 7/217:15 -

1 stop12h 10m

Deal found 7/11£494

Sat 13/210:00 -

1 stop10h 55m

Sun 14/217:35 -

2 stops18h 00m

Deal found 7/11£501

Thu 10/1206:30 -

2 stops14h 53m

Thu 24/1213:50 -

1 stop11h 35m

Deal found 7/11£540

Thu 24/1216:20 -

Nonstop8h 55m

Wed 3/217:25 -

1 stop14h 35m

Deal found 8/11£540

Thu 24/1208:40 -

1 stop12h 05m

Wed 30/1218:20 -

1 stop9h 30m

Deal found 10/11£553

Thu 4/210:00 -

2 stops16h 09m

Thu 18/217:37 -

2 stops17h 58m

Deal found 9/11£504

Wed 3/210:40 -

1 stop14h 50m

Sat 6/217:25 -

2 stops22h 15m

Deal found 5/11£514

Sat 26/1213:05 -

Nonstop8h 40m

Sun 10/118:55 -

Nonstop7h 25m

Deal found 6/11£543

Sat 12/1216:20 -

Nonstop8h 55m

Sun 18/422:10 -

Nonstop7h 30m

Deal found 9/11£547

Mon 14/1210:00 -

1 stop10h 55m

Thu 31/1218:15 -

1 stop9h 50m

Deal found 9/11£562

Mon 1/316:35 -

1 stop27h 05m

Tue 27/416:40 -

1 stop17h 55m

Deal found 5/11£527

Wed 31/310:05 -

1 stop10h 25m

Fri 9/417:25 -

1 stop9h 30m

Deal found 9/11£543

Mon 14/1207:30 -

2 stops18h 30m

Fri 11/622:10 -

2 stops30h 50m

Deal found 7/11£571

Wed 24/309:35 -

2 stops34h 40m

Fri 16/416:40 -

2 stops38h 20m

Deal found 6/11£528

Thu 28/110:55 -

1 stop37h 30m

Mon 1/221:20 -

1 stop31h 35m

Deal found 7/11£744

Sat 12/1210:00 -

1 stop11h 30m

Wed 30/1218:40 -

1 stop16h 05m

Deal found 9/11£572

Wed 25/1107:45 -

2 stops14h 43m

Sun 29/1117:35 -

1 stop19h 50m

Deal found 5/11£641

Wed 2/1209:00 -

1 stop13h 00m

Wed 9/1218:20 -

Nonstop7h 20m

Deal found 8/11£601

Mon 29/316:25 -

1 stop27h 45m

Sun 11/422:05 -

1 stop30h 45m

Deal found 9/11£577

Fri 4/1210:55 -

1 stop37h 30m

Wed 9/1213:30 -

1 stop15h 25m

Deal found 9/11£769

Find flight deals from London to Dulles Intl

Round-trip from	£405
One-way from	£389
Popular in	May
Cheapest in	March
Average price	£552
Good round-trip deal	£534 or less
Good one-way deal	£426 or less

Icelandair
25/12-28/1
2 total stops
21h 25m total
London to Washington, D.C.

Search Deals

30/11-31/12
3 total stops
48h 25m total
London to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 5% potential increase in price (£23 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 November 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.

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

LGWIAD

London Gatwick

Mon 7/12

16:35-14:40

1 stop27h 05m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£390

LondonWashington, D.C.

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

STNIAD

London Stansted

Sun 14/3

14:10-16:45

1 stop30h 35m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£399

LondonWashington, D.C.

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

LGWIAD

London Gatwick

Sun 13/12

21:25-15:15

2 stops22h 50m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£401

LondonWashington, D.C.

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

LHRIAD

London Heathrow

Sun 14/3

15:15-17:20

3 stops30h 05m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£402

LondonWashington, D.C.

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

STNIAD

London Stansted

Sun 21/3

22:05-19:30

3 stops25h 25m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£410

LondonWashington, D.C.

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

LGWIAD

London Gatwick

Sat 16/1

10:10-15:15

2 stops58h 05m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£413

LondonWashington, D.C.

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

STNIAD

London Stansted

Wed 9/12

07:55-18:30

2 stops15h 35m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£425

LondonWashington, D.C.

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

STNIAD

London Stansted

Thu 19/11

08:05-18:30

1 stop15h 25m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£430

LondonWashington, D.C.

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

LGWIAD

London Gatwick

Mon 15/2

16:35-14:40

1 stop27h 05m

Washington, D.C. Dulles Intl

Tue 23/2

17:25-15:45

1 stop17h 20m

£433

LondonWashington, D.C.

LCY London City - IAD Washington, D.C. Dulles Intl

LCYIAD

London City

Fri 15/1

07:40-16:20

1 stop13h 40m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£439

Flights are sorted by cheapest return flights first.

Deals found on 8/11

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

STN-IAD

LCY-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

STN-IAD

LCY-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 £483). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £580). 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 Sunday (27 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (19 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 £477 and £615 in December.
The cheapest return price found within the last 5 days was £405 on Icelandair (25 Dec–28 Jan).

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?

Amsterdam (AMS) is the most affordable one-stop option, with an average return flight price of £441.

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: 10h 45m.

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 08m.

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 Virgin Atlantic,Aer Lingus, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Virgin Atlantic

7.5

Good

698 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

Virgin Atlantic

7.5

Good

698 reviews

Virgin Atlantic

7.5

Good

698 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

Aer Lingus

7.3

Good

1,882 reviews

Virgin Atlantic

7.5

Good

698 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

United Airlines

7.3

Good

10,479 reviews

Virgin Atlantic

7.5

Good

698 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

Lufthansa

6.8

Okay

8,292 reviews

Virgin Atlantic

7.5

Good

698 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

British Airways

6.7

Okay

8,286 reviews

Virgin Atlantic

7.5

Good

698 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

Related info for your journey

How long is the flight from London to Washington, D.C. Dulles Intl Airport?
For as low as £483, TAP AIR PORTUGAL can have you in Washington, D.C. Dulles Intl Airport from London in 11h 30m. London and Washington, D.C. Dulles Intl Airport are separated by a distance of 3683 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 £286 on this airline. Additional options worth looking into are TAP AIR PORTUGAL and Virgin Atlantic, starting at £342 and £401 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 £334. 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 (75%), Austrian Airlines (75%), Copa Airlines( 75%).
What are the cheapest flights from London to Washington, D.C. Dulles Intl Airport?
On average you can expect to pay £992 for a flight from London to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £365 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at £263.
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 £483). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £580). 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

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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£286	Average£440	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
TAP AIR PORTUGAL	Cheapest£342	Average£463	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Virgin Atlantic	Cheapest£401	Average£551	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Aer Lingus	Cheapest£401	Average£598	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Scandinavian Airlines	Cheapest£410	Average£518	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Lufthansa	Cheapest£412	Average£564	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
British Airways	Cheapest£413	Average£561	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Iberia	Cheapest£417	Average£563	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
Finnair	Cheapest£418	Average£577	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Austrian Airlines	Cheapest£421	Average£563	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines 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 £389

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/11. 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 10 November 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 10 November 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 10 November 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 10 November 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 10 November 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 10 November 2026.

Last-minute flights from London to Dulles IntlDiscover last-minute flight deals from London to Dulles Intl. Data last updated 10 November 2026 and is based on user searches.

Discover last-minute flight deals from London to Dulles Intl. Data last updated 10 November 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 10 November 2026.

Search for one-way flight options from London to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 10 November 2026.

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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 10 November 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 10 November 2026.

The most flights from LON to IAD are scheduled on a Sunday (27 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (19 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 £477 and £615 in December.The cheapest return price found within the last 5 days was £405 on Icelandair (25 Dec–28 Jan).

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.

Amsterdam (AMS) is the most affordable one-stop option, with an average return flight price of £441.

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: 10h 45m.

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 08m.

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 Virgin Atlantic,Aer Lingus, andUnited Airlines. 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?

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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 10 November 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 10 November 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 10 November 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 10 November 2026.

Last-minute flights from London to Dulles Intl
Discover last-minute flight deals from London to Dulles Intl. Data last updated 10 November 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 10 November 2026.

London to Washington, D.C. Dulles Intl Airport flights typically cost between £477 and £615 in December.
The cheapest return price found within the last 5 days was £405 on Icelandair (25 Dec–28 Jan).