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

There are many flights that can get you from Washington, D.C. Dulles Intl Airport to London in 10h 15m. Fly via TAP AIR PORTUGAL, Icelandair, or Scandinavian Airlines to get the fastest option. Airlines will cover 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 Washington, D.C. Dulles Intl Airport to London round-trip?

Flying on British Airways is currently your cheapest option to London, with prices starting at £426. Additional return tickets that might be worth considering are offered by Virgin Atlantic and Icelandair, with the lowest prices starting at £447 and £488, respectively. British Airways is 30% cheaper than the average price of flights available within the next 90 days to this destination.

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

The cheapest airline one-way is Virgin Atlantic, with whom users have recently found tickets for as low as £212. However, be on the lookout for offers from British Airways and United Airlines, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to London for a low price.

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London, 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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

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

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

Looking at all options, your cheapest flight can be booked for £225. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for £405 on average, our data indicates £610 when flying from Washington, D.C. Dulles Intl Airport to London.

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

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. Dulles Intl Airport to London on time: SAUDIA (69%), Aer Lingus (68%), Iberia (68%).

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

British Airways, United Airlines and Virgin Atlantic are the most popular airlines when flying from Washington, D.C. Dulles Intl Airport to London.

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

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

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

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

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

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

£242+ Cheap Flights from Washington, D.C. Dulles Intl Airport to London

Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to London are usually found in February or October, booked 74 days in advance, depart on a Monday or Tuesday and return on a Friday

Cheap flight deals from Dulles Intl to London

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

Cheapest flights from Dulles Intl to London
Explore the most affordable flight options available from Dulles Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 September 2026.

Mon 5/1011:12 -

1 stop17h 48m

Fri 9/1014:00 -

1 stop25h 17m

Deal found 4/9£519

Tue 22/920:30 -

1 stop10h 25m

Wed 30/921:25 -

1 stop26h 55m

Deal found 3/9£519

Thu 5/1112:30 -

2 stops16h 35m

Wed 18/1108:15 -

1 stop14h 00m

Deal found 7/9£519

Mon 9/1118:36 -

2 stops31h 14m

Sun 15/1112:35 -

1 stop26h 46m

Deal found 7/9£519

Sat 17/1020:30 -

2 stops20h 05m

Wed 21/1010:20 -

2 stops16h 55m

Deal found 7/9£519

Sun 1/1122:30 -

2 stops16h 45m

Sun 8/1109:45 -

2 stops34h 30m

Deal found 3/9£520

Mon 28/911:12 -

1 stop17h 48m

Fri 2/1014:00 -

1 stop23h 38m

Deal found 4/9£520

Wed 14/1023:20 -

2 stops17h 15m

Wed 21/1010:20 -

2 stops16h 55m

Deal found 3/9£520

Wed 16/1219:40 -

1 stop16h 45m

Wed 6/108:20 -

1 stop15h 10m

Deal found 6/9£521

Mon 5/1017:40 -

2 stops22h 25m

Tue 13/1009:15 -

2 stops34h 55m

Deal found 3/9£521

Fri 2/1011:12 -

1 stop17h 48m

Wed 7/1014:00 -

1 stop25h 17m

Deal found 2/9£522

Fri 6/1119:40 -

1 stop13h 15m

Mon 16/1108:00 -

1 stop15h 30m

Deal found 3/9£522

Best flights from Dulles Intl to London
Discover carefully curated flight deals from Dulles Intl to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 7 September 2026.

Wed 9/1219:40 -

2 stops16h 00m

Tue 15/1208:15 -

2 stops15h 15m

Deal found 3/9£549

Thu 21/117:25 -

1 stop17h 25m

Tue 26/116:35 -

1 stop33h 00m

Deal found 3/9£558

Sun 6/1219:40 -

1 stop10h 15m

Sun 10/111:55 -

1 stop11h 35m

Deal found 2/9£581

Tue 6/1012:30 -

2 stops16h 05m

Thu 12/1106:40 -

1 stop15h 35m

Deal found 3/9£614

Mon 30/1118:55 -

Nonstop7h 25m

Thu 10/1208:40 -

1 stop12h 05m

Deal found 2/9£631

Wed 7/1021:40 -

1 stop31h 15m

Wed 14/1010:50 -

1 stop29h 40m

Deal found 6/9£632

Wed 4/1118:20 -

Nonstop7h 20m

Mon 9/1112:05 -

1 stop33h 55m

Deal found 6/9£652

Tue 13/1018:32 -

2 stops17h 08m

Fri 30/1009:20 -

1 stop11h 35m

Deal found 3/9£654

Fri 16/1017:30 -

1 stop9h 25m

Thu 22/1010:00 -

1 stop10h 35m

Deal found 5/9£689

Wed 4/1122:30 -

2 stops18h 50m

Sun 15/1117:15 -

2 stops27h 00m

Deal found 6/9£559

Sat 5/1219:40 -

1 stop10h 15m

Fri 8/111:55 -

1 stop11h 35m

Deal found 2/9£581

Mon 30/1117:25 -

2 stops22h 10m

Wed 9/1216:35 -

1 stop27h 40m

Deal found 4/9£587

Sat 27/220:30 -

2 stops17h 20m

Fri 5/306:40 -

2 stops34h 12m

Deal found 3/9£619

Mon 7/1218:55 -

Nonstop7h 25m

Thu 10/1211:45 -

1 stop33h 10m

Deal found 4/9£631

Sun 4/1021:40 -

1 stop38h 00m

Tue 13/1017:35 -

1 stop22h 55m

Deal found 4/9£632

Thu 15/1017:45 -

2 stops15h 20m

Sun 18/1012:45 -

2 stops31h 25m

Deal found 3/9£578

Wed 28/1023:30 -

2 stops30h 30m

Wed 4/1116:35 -

1 stop27h 40m

Deal found 6/9£587

Wed 11/1118:20 -

2 stops17h 15m

Tue 24/1110:00 -

1 stop10h 45m

Deal found 6/9£655

Wed 28/1021:30 -

1 stop17h 00m

Sat 7/1106:40 -

1 stop17h 10m

Deal found 6/9£623

Sun 25/1018:45 -

1 stop9h 25m

Mon 2/1110:00 -

1 stop10h 55m

Deal found 4/9£689

Mon 19/1020:30 -

1 stop13h 10m

Wed 28/1011:55 -

1 stop11h 35m

Deal found 4/9£627

Sun 4/1013:15 -

2 stops26h 50m

Tue 13/1008:05 -

2 stops32h 25m

Deal found 4/9£584

Tue 20/1017:30 -

1 stop9h 25m

Wed 28/1010:00 -

1 stop10h 55m

Deal found 6/9£652

Thu 15/1021:40 -

1 stop19h 45m

Wed 21/1007:25 -

1 stop17h 20m

Deal found 5/9£661

Tue 27/1018:45 -

1 stop17h 50m

Sun 1/1118:55 -

1 stop26h 00m

Deal found 6/9£689

Mon 5/1022:35 -

1 stop12h 00m

Mon 12/1016:25 -

1 stop27h 45m

Deal found 6/9£632

Fri 13/1112:35 -

2 stops15h 45m

Tue 17/1119:30 -

1 stop26h 45m

Deal found 7/9£650

Thu 5/1114:30 -

1 stop14h 25m

Mon 9/1110:55 -

1 stop29h 50m

Deal found 2/9£662

Tue 24/1115:00 -

1 stop10h 25m

Mon 30/1111:45 -

1 stop33h 00m

Deal found 4/9£685

Fri 23/1017:30 -

1 stop13h 10m

Tue 27/1009:20 -

1 stop11h 25m

Deal found 2/9£689

Find flight deals from Dulles Intl to London

Round-trip from	£519
One-way from	£242
Popular in	June
Cheapest in	February
Average price	£620
Good round-trip deal	£766 or less
Good one-way deal	£342 or less

5/10-9/10
2 total stops
43h 05m total
Washington, D.C. to London

Search Deals

4/11-31/12
2 total stops
35h 05m total
Washington, D.C. to London

Search Deals

Highest demand for flights based on searches. 19% potential increase in price (£109 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£19 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

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

Search Deals

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

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Washington, D.C.London

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

IADLTN

Washington, D.C. Dulles Intl

Sat 19/9

11:25-11:25

2 stops43h 00m

London Luton

Wed 31/12

00:00-18:00

Nonstop0h 00m

£243

Washington, D.C.London

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

IADSTN

Washington, D.C. Dulles Intl

Sat 19/9

23:20-14:25

2 stops34h 05m

London Stansted

Wed 31/12

00:00-18:00

Nonstop0h 00m

£244

Washington, D.C.London

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

IADSTN

Washington, D.C. Dulles Intl

Sat 28/11

17:25-18:25

2 stops20h 00m

London Stansted

Wed 31/12

00:00-18:00

Nonstop0h 00m

£245

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Wed 10/2

08:15-07:10

2 stops17h 55m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£246

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Wed 3/3

08:15-07:10

2 stops17h 55m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£246

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Sat 6/3

22:10-05:55

1 stop26h 45m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£252

Washington, D.C.London

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

IADLTN

Washington, D.C. Dulles Intl

Thu 10/12

19:40-23:00

3 stops22h 20m

London Luton

Wed 31/12

00:00-18:00

Nonstop0h 00m

£256

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - SEN London Southend

IADSEN

Washington, D.C. Dulles Intl

Thu 10/12

19:40-13:20

3 stops36h 40m

London Southend

Wed 31/12

00:00-18:00

Nonstop0h 00m

£257

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - SEN London Southend

IADSEN

Washington, D.C. Dulles Intl

Mon 9/11

19:40-22:25

3 stops21h 45m

London Southend

Wed 31/12

00:00-18:00

Nonstop0h 00m

£257

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - SEN London Southend

IADSEN

Washington, D.C. Dulles Intl

Fri 15/1

19:40-22:40

3 stops22h 00m

London Southend

Wed 31/12

00:00-18:00

Nonstop0h 00m

£263

Flights are sorted by cheapest return flights first.

Deals found on 5/9

Showing 1-10 of 60 resultsSorted by cheapest first

...

Best time to book a flight from Dulles Intl to London

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

IAD-LON

IAD-LHR

IAD-STN

IAD-LCY

IAD-LGW

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 Washington, D.C. Dulles Intl Airport to London

IAD-LON

IAD-LHR

IAD-STN

IAD-LCY

IAD-LGW

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

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London (average of £507). Flying from Washington, D.C. Dulles Intl Airport to London in June is currently the most expensive (average of £945). 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 IAD to LON?

When flying from Washington, D.C. Dulles Intl Airport to London, 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 Washington, D.C. Dulles Intl Airport to London

The most flights from IAD to LON are scheduled on a Thursday (29 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (10 on average).

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

Airfare is typical for this route at the moment.

Washington, D.C. Dulles Intl Airport to London flights typically cost between £513 and £766 in October.
The cheapest return price found within the last 5 days was £519 on Multiple Airlines (5 Oct–9 Oct).

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

Reykjavik (KEF) – chosen by Cheapflights users on 52% of one-stop itineraries from Washington, D.C. Dulles Intl Airport to London on Cheapflights.

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

Lisbon (LIS) is the most affordable one-stop option, with an average return flight price of £493.

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

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 9h 42m.

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

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 1h 20m.

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

About 17% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 172 minutes.

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

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

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

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

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

Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 13% of flights being delayed.

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

To ensure you get the cheapest price possible for a flight from Washington, D.C. Dulles Intl Airport to London, you should look to book at least 62 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Reviews of airlines servicing London

See what other customers who have flown with United Airlines,Virgin Atlantic, andBritish Airways from Washington, D.C. Dulles Intl Airport to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

10,176 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

United Airlines

7.4

Good

10,176 reviews

United Airlines

7.4

Good

10,176 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

Virgin Atlantic

7.4

Good

694 reviews

United Airlines

7.4

Good

10,176 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

British Airways

6.7

Okay

8,209 reviews

United Airlines

7.4

Good

10,176 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

Related info for your journey

How long is the flight from Washington, D.C. Dulles Intl Airport to London?
There are many flights that can get you from Washington, D.C. Dulles Intl Airport to London in 10h 15m. Fly via TAP AIR PORTUGAL, Icelandair, or Scandinavian Airlines to get the fastest option. Airlines will cover 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 Washington, D.C. Dulles Intl Airport to London round-trip?
Flying on British Airways is currently your cheapest option to London, with prices starting at £426. Additional return tickets that might be worth considering are offered by Virgin Atlantic and Icelandair, with the lowest prices starting at £447 and £488, respectively. British Airways is 30% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to London one-way?
The cheapest airline one-way is Virgin Atlantic, with whom users have recently found tickets for as low as £212. However, be on the lookout for offers from British Airways and United Airlines, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to London for a low price.
What are the most popular routes from Washington, D.C. Dulles Intl Airport to London?
The most popular flight routes from Washington, D.C. Dulles Intl Airport to London are Washington, D.C. Dulles Intl - London Heathrow, Washington, D.C. Dulles Intl - London Gatwick and Washington, D.C. Dulles Intl - London Stansted.
What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to London?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. Dulles Intl Airport to London on time: SAUDIA (69%), Aer Lingus (68%), Iberia (68%).
What are the cheapest flights from Washington, D.C. Dulles Intl Airport to London?
Looking at all options, your cheapest flight can be booked for £225. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for £405 on average, our data indicates £610 when flying from Washington, D.C. Dulles Intl Airport to London.
Can I find deals for flights from Dulles Intl to London that include hotel bookings?
Yes. In addition to deals on Dulles Intl to London flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Dulles Intl to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to London.
Can I find deals for business class flights from Dulles Intl to London?
Yes. Cheapflights offers flight deals from Dulles Intl to London 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 Washington, D.C. Dulles Intl Airport to London?
Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London (average of £507). Flying from Washington, D.C. Dulles Intl Airport to London in June is currently the most expensive (average of £945). 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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Luton

Gatwick

Wembley

Slough

Ilford

Hayes

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Baltimore to Bristol flights

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Dulles Intl to East Midlands flights

Top 5 airlines flying from Dulles Intl to London

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£426	Average£632	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Virgin Atlantic	Cheapest£447	Average£587	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Icelandair	Cheapest£488	Average£692	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
United Airlines	Cheapest£490	Average£718	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Delta	Cheapest£590	Average£957	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights

Fly with Cheapflights

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

When you search for this flight from Dulles Intl to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Dulles Intl to London for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

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

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Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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Cheap flights from Washington, D.C. Dulles Intl Airport to London from £242

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Dulles Intl to London

Cheapest flights from Dulles Intl to LondonExplore the most affordable flight options available from Dulles Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 September 2026.

Explore the most affordable flight options available from Dulles Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 September 2026.

Best flights from Dulles Intl to LondonDiscover carefully curated flight deals from Dulles Intl to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 7 September 2026.

Discover carefully curated flight deals from Dulles Intl to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 7 September 2026.

Direct flights from Dulles Intl to LondonExplore direct flight options from Dulles Intl to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 7 September 2026.

Explore direct flight options from Dulles Intl to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 7 September 2026.

Last-minute flights from Dulles Intl to LondonDiscover last-minute flight deals from Dulles Intl to London. Data last updated 7 September 2026 and is based on user searches.

Discover last-minute flight deals from Dulles Intl to London. Data last updated 7 September 2026 and is based on user searches.

One-way flights from Dulles Intl to LondonSearch for one-way flight options from Dulles Intl to London. Find affordable one-way fares based on user searches. Data last updated 7 September 2026.

Search for one-way flight options from Dulles Intl to London. Find affordable one-way fares based on user searches. Data last updated 7 September 2026.

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

Best time to book a flight from Dulles Intl to London

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

Cheapflights Insights

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

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

Find hourly flight availability from Dulles Intl to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 7 September 2026.

When flying from Washington, D.C. Dulles Intl Airport to London, 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 Washington, D.C. Dulles Intl Airport to London

Explore weekly flight availability from Dulles Intl to London. 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 7 September 2026.

The most flights from IAD to LON are scheduled on a Thursday (29 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (10 on average).

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

Airfare is typical for this route at the moment.

Washington, D.C. Dulles Intl Airport to London flights typically cost between £513 and £766 in October.The cheapest return price found within the last 5 days was £519 on Multiple Airlines (5 Oct–9 Oct).

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

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

Reykjavik (KEF) – chosen by Cheapflights users on 52% of one-stop itineraries from Washington, D.C. Dulles Intl Airport to London on Cheapflights.

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

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

Lisbon (LIS) is the most affordable one-stop option, with an average return flight price of £493.

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

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

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 9h 42m.

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

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

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 1h 20m.

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

About 17% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 172 minutes.

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

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

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

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

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

Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 13% of flights being delayed.

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

To ensure you get the cheapest price possible for a flight from Washington, D.C. Dulles Intl Airport to London, you should look to book at least 62 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Reviews of airlines servicing London

See what other customers who have flown with United Airlines,Virgin Atlantic, andBritish Airways from Washington, D.C. Dulles Intl Airport to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

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

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

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

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

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

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

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

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

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Alternative routes for Dulles Intl to London

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Direct flights to England

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Cheapest flights from Dulles Intl to London
Explore the most affordable flight options available from Dulles Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 September 2026.

Best flights from Dulles Intl to London
Discover carefully curated flight deals from Dulles Intl to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 7 September 2026.

Direct flights from Dulles Intl to London
Explore direct flight options from Dulles Intl to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 7 September 2026.

Last-minute flights from Dulles Intl to London
Discover last-minute flight deals from Dulles Intl to London. Data last updated 7 September 2026 and is based on user searches.

One-way flights from Dulles Intl to London
Search for one-way flight options from Dulles Intl to London. Find affordable one-way fares based on user searches. Data last updated 7 September 2026.

Washington, D.C. Dulles Intl Airport to London flights typically cost between £513 and £766 in October.
The cheapest return price found within the last 5 days was £519 on Multiple Airlines (5 Oct–9 Oct).