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Cheap flights from Washington, D.C. Dulles Intl Airport to London from £184

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to London departing on 11/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to London

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
20:30 - 20:30IAD-STN
19h 00m2 stops
Multiple Airlines Logo
12:00 - 16:40STN-IAD
33h 40m2 stops
£421Multiple Airlines
Find Deal
Tue, 25 Nov - Mon, 1 Dec
Multiple Airlines Logo
19:40 - 15:10IAD-LGW
14h 30m2 stops
Multiple Airlines Logo
08:50 - 18:30LGW-IAD
14h 40m2 stops
£421Multiple Airlines
Find Deal
Thu, 13 Nov - Tue, 18 Nov
Icelandair Logo
19:40 - 10:55IAD-LGW
10h 15m1 stop
Icelandair Logo
11:55 - 18:30LGW-IAD
11h 35m1 stop
£421Icelandair
Find Deal
Thu, 27 Nov - Tue, 2 Dec
Icelandair Logo
20:30 - 11:55IAD-LHR
10h 25m1 stop
Icelandair Logo
21:25 - 19:20LHR-IAD
26h 55m1 stop
£421Icelandair
Find Deal
Wed, 1 Apr - Sat, 11 Apr
Virgin Atlantic Logo
22:20 - 10:50IAD-LHR
7h 30mdirect
Virgin Atlantic Logo
06:20 - 19:15LHR-IAD
17h 55m1 stop
£433Virgin Atlantic
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Tue, 2 Dec - Tue, 9 Dec
Iberia Logo
18:20 - 06:30IAD-LHR
7h 10mdirect
Iberia Logo
12:10 - 15:35LHR-IAD
8h 25mdirect
£435Iberia
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Wed, 3 Dec - Wed, 10 Dec
British Airways Logo
21:45 - 10:00IAD-LHR
7h 15mdirect
British Airways Logo
16:25 - 19:55LHR-IAD
8h 30mdirect
£439British Airways
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Wed, 10 Dec - Thu, 25 Dec
British Airways Logo
18:20 - 06:30IAD-LHR
7h 10mdirect
British Airways Logo
12:10 - 15:35LHR-IAD
8h 25mdirect
£439British Airways
Find Deal
Tue, 2 Dec - Thu, 11 Dec
Iberia Logo
18:20 - 06:30IAD-LHR
7h 10mdirect
Iberia Logo
12:10 - 15:35LHR-IAD
8h 25mdirect
£440Iberia
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Wed, 7 Jan - Tue, 20 Jan
Virgin Atlantic Logo
11:06 - 07:15IAD-LCY
15h 09m2 stops
Virgin Atlantic Logo
09:20 - 16:05LCY-IAD
11h 45m1 stop
£480Virgin Atlantic
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Wed, 3 Dec - Tue, 9 Dec

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

Our best Virgin Atlantic deals on Washington, D.C. Dulles Intl Airport to London flight tickets
Virgin Atlantic
26 Oct
IAD23:20Washington, D.C. Dulles Intl
7h 30m
LHR10:50London Heathrow
4 Nov
LHR10:00London Heathrow
11h 05m
1 stop
IAD16:05Washington, D.C. Dulles Intl
£420
Find similar
Virgin Atlantic
26 Oct
IAD23:20Washington, D.C. Dulles Intl
7h 30m
LHR10:50London Heathrow
4 Nov
LHR11:30London Heathrow
12h 45m
1 stop
IAD19:15Washington, D.C. Dulles Intl
£421
Find similar
Virgin Atlantic
26 Oct
IAD23:20Washington, D.C. Dulles Intl
7h 30m
LHR10:50London Heathrow
4 Nov
LHR08:55London Heathrow
12h 40m
1 stop
IAD16:35Washington, D.C. Dulles Intl
£422
Find similar

Delta flights from Washington, D.C. Dulles Intl Airport to London

Our best Delta deals on Washington, D.C. Dulles Intl Airport to London flight tickets
Delta
26 Oct
IAD23:20Washington, D.C. Dulles Intl
7h 30m
LHR10:50London Heathrow
4 Nov
LHR09:00London Heathrow
12h 35m
1 stop
IAD16:35Washington, D.C. Dulles Intl
£433
Find similar
Delta
19 Nov
IAD22:20Washington, D.C. Dulles Intl
7h 30m
LHR10:50London Heathrow
24 Nov
LHR11:45London Heathrow
33h 20m
1 stop
IAD16:05Washington, D.C. Dulles Intl
£434
Find similar
Delta
26 Oct
IAD23:20Washington, D.C. Dulles Intl
7h 30m
LHR10:50London Heathrow
4 Nov
LHR10:00London Heathrow
11h 05m
1 stop
IAD16:05Washington, D.C. Dulles Intl
£435
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Washington, D.C. Dulles Intl Airport to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 24 October 2025.
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

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Tue 25/11

20:30-20:30

2 stops19h 00m

London Stansted

Mon 1/12

12:00-16:40

2 stops33h 40m

£421

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 13/11

19:40-15:10

2 stops14h 30m

London Gatwick

Tue 18/11

08:50-18:30

2 stops14h 40m

£421

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 27/11

19:40-10:55

1 stop10h 15m

London Gatwick

Tue 2/12

11:55-18:30

1 stop11h 35m

£421

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 1/4

20:30-11:55

1 stop10h 25m

London Heathrow

Sat 11/4

21:25-19:20

1 stop26h 55m

£421

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 2/12

22:20-10:50

Nonstop7h 30m

London Heathrow

Tue 9/12

06:20-19:15

1 stop17h 55m

£433

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 3/12

18:20-06:30

Nonstop7h 10m

London Heathrow

Wed 10/12

12:10-15:35

Nonstop8h 25m

£435

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 10/12

21:45-10:00

Nonstop7h 15m

London Heathrow

Thu 25/12

16:25-19:55

Nonstop8h 30m

£439

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 2/12

18:20-06:30

Nonstop7h 10m

London Heathrow

Thu 11/12

12:10-15:35

Nonstop8h 25m

£439

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 7/1

18:20-06:30

Nonstop7h 10m

London Heathrow

Tue 20/1

12:10-15:35

Nonstop8h 25m

£440

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Wed 3/12

11:06-07:15

2 stops15h 09m

London City

Tue 9/12

09:20-16:05

1 stop11h 45m

£480

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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See travel insights to London from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Washington, D.C. Dulles Intl Airport and London?

What is the cheapest month to fly to London?

The cheapest month to fly to London from Washington, D.C. Dulles Intl Airport is in January. Flight prices, which tend to average around £469, are often lower during this time because this is during the off-season. The month of September is another great option to travel to London, with average flight prices from Washington, D.C. Dulles Intl Airport averaging around £475.

What is the cheapest day to depart on your flight to London?

Our data shows that Wednesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £529. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. Dulles Intl Airport to London for around £640.

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as £580. Flights at midday are often more expensive, with an average ticket price of £1,435.

What is the cheapest Washington, D.C. Dulles Intl to London flight route?

Fly from Washington, D.C. Dulles Intl to London Heathrow for the best Washington, D.C. Dulles Intl - London flight prices

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £569 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Washington, D.C. Dulles Intl Airport for as low as £529 on momondo.

What cabin class options are available on Washington, D.C. Dulles Intl to London flights?

There are 4 cabin classes available to choose from on Washington, D.C. Dulles Intl to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Washington, D.C. Dulles Intl Airport to London flight prices changed over time?

As of October 2025, prices for Washington, D.C. Dulles Intl Airport to London flights are approximately 71% more expensive when compared to flights at the same time last year.

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

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to London according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Washington, D.C. Dulles Intl Airport to London (IAD to LON) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to London

Best price found

£279

Fastest flight time

7h 10m

Direct flights

Every day

Airports in London

1 airport
The best one-way flight to London from Washington, D.C. Dulles Intl Airport in the past 72 hours is £279. The best return flight deal from Washington, D.C. Dulles Intl Airport to London found on momondo in the last 72 hours is £578.
The fastest flight from Washington, D.C. Dulles Intl Airport to London takes 7h 10m
Direct flights go from Washington, D.C. Dulles Intl Airport to London every day.
There is 1 airport near London: London Heathrow (LHR)
Search flight deals

  • How far is Washington, D.C. Dulles Intl to London by plane?

    London is 3677.3 mi away from Washington, D.C. Dulles Intl. In terms of flight time, this usually takes a little over 7h 10m.

  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to London?

    Prices for flights from Washington, D.C. Dulles Intl Airport to London are refreshed on a daily basis.

  • How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to London?

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to London?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. Dulles Intl Airport to London.

  • What documentation or ID do you need to fly to London?

    The travel and health documents required for your trip to London can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Washington, D.C. Dulles Intl Airport to London?

  • What is the most popular airline from Washington, D.C. Dulles Intl Airport to London?

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

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to London with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom £311Free CancellationRating
6.8
7,518 reviews
Search Lufthansa flights
IcelandairPriceFrom £370Free CancellationRating
7.1
561 reviews
Search Icelandair flights
Virgin AtlanticPriceFrom £384Free CancellationRating
7.5
670 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom £388Free CancellationRating
6.7
7,469 reviews
Search British Airways flights
Air FrancePriceFrom £399Free CancellationRating
7.4
1,477 reviews
Search Air France flights
IberiaPriceFrom £460Free CancellationRating
7.0
2,997 reviews
Search Iberia flights
KLMPriceFrom £508Free CancellationRating
7.7
1,405 reviews
Search KLM flights
United AirlinesPriceFrom £527Free CancellationRating
7.4
8,994 reviews
Search United Airlines flights

  • KLM Flights From Washington, D.C. Dulles Intl Airport to London

    The lowest priced KLM flight from Washington, D.C. Dulles Intl Airport to London from the last 72 hours was £508. Generally, KLM has 1 flight on this route every week with an average price of £652. KLM is rated 7.7/10 by our users.

  • Virgin Atlantic Flights From Washington, D.C. Dulles Intl Airport to London

    Across 670 Virgin Atlantic reviews on momondo, the average score is 7.5/10. Virgin Atlantic flies from Washington, D.C. Dulles Intl Airport to London about 1 time each week, with ticket deals ranging from £384 to £641. Price data is based on momondo searches in the last 72 hours.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Gatwick
Maidstone
Slough
Canterbury
Southend-on-Sea
Ipswich
Ilford
Guildford
Colchester
Dover
Hayes
Chelmsford
Worthing
Bedford
Dartford
Ramsgate
Stansted

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to London?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington, D.C. to London. momondo saves you time and could save you money on your trip.

Can I find flights from Washington, D.C. to London with flexible booking policies on momondo?

All flight searches from Washington, D.C. to London on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Washington, D.C. to London?

Once you have performed a search for Washington, D.C. to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Washington, D.C. to London right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to London from Washington, D.C.. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London
London City Airport
London Gatwick Airport
London Heathrow Airport
London Luton Airport
London Southend Airport
London Stansted Airport