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Cheap flights from Washington, D.C. Dulles Intl Airport to London from $267

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 10/19. 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 round-trip flights

Multiple Airlines Logo
7:40 pm - 6:20 pmIAD-STN
17h 40m2 stops
Multiple Airlines Logo
6:30 am - 6:30 pmSTN-IAD
17h 00m2 stops
$487Multiple Airlines
Find Deal
Fri, Nov 14 - Sat, Nov 22
Scandinavian Airlines Logo
8:30 pm - 12:55 pmIAD-LHR
35h 25m2 stops
Scandinavian Airlines Logo
6:40 am - 6:50 pmLHR-IAD
17h 10m2 stops
$488Scandinavian Airlines
Find Deal
Wed, Nov 12 - Sat, Nov 15
Icelandair Logo
11:15 pm - 2:40 pmIAD-LGW
10h 25m1 stop
Icelandair Logo
3:40 pm - 7:20 pmLGW-IAD
32h 40m1 stop
$489Icelandair
Find Deal
Wed, Oct 1 - Tue, Oct 7
Icelandair Logo
11:15 pm - 11:55 amIAD-LHR
31h 40m1 stop
Icelandair Logo
1:05 pm - 7:20 pmLHR-IAD
11h 15m1 stop
$489Icelandair
Find Deal
Sun, Sep 28 - Tue, Oct 7
Virgin Atlantic Logo
5:50 pm - 6:20 amIAD-LHR
7h 30mnonstop
Virgin Atlantic Logo
9:00 am - 4:20 pmLHR-IAD
12h 20m1 stop
$536Virgin Atlantic
Find Deal
Sun, Sep 28 - Tue, Oct 7
Lufthansa Logo
10:25 pm - 10:40 amIAD-LHR
7h 15mnonstop
Lufthansa Logo
6:50 am - 2:25 pmLHR-IAD
12h 35m1 stop
$537Lufthansa
Find Deal
Wed, Oct 15 - Tue, Oct 21
Virgin Atlantic Logo
5:50 pm - 6:20 amIAD-LHR
7h 30mnonstop
Virgin Atlantic Logo
6:30 am - 3:35 pmLHR-IAD
14h 05m1 stop
$538Virgin Atlantic
Find Deal
Sun, Sep 28 - Tue, Oct 7
Delta Logo
5:25 pm - 8:50 amIAD-LCY
10h 25m1 stop
Delta Logo
10:00 am - 3:35 pmLCY-IAD
10h 35m1 stop
$639Delta
Find Deal
Sun, Sep 28 - Tue, Oct 7
Delta Logo
12:08 pm - 7:15 amIAD-LCY
38h 07m2 stops
Delta Logo
10:00 am - 3:35 pmLCY-IAD
10h 35m1 stop
$642Delta
Find Deal
Sun, Sep 28 - Wed, Oct 15
Lufthansa Logo
10:20 pm - 4:25 pmIAD-LCY
13h 05m2 stops
Lufthansa Logo
8:55 am - 3:50 pmLCY-IAD
11h 55m1 stop
$658Lufthansa
Find Deal
Mon, Sep 22 - Fri, Oct 10

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

Our best Scandinavian Airlines deals on Washington, D.C. Dulles Intl Airport to London flight tickets
Scandinavian Airlines
Nov 12
IAD8:30 pmWashington, D.C. Dulles Intl
35h 25m
2 stops
LHR12:55 pmLondon Heathrow
Nov 15
LHR6:40 amLondon Heathrow
17h 10m
2 stops
IAD6:50 pmWashington, D.C. Dulles Intl
$488
Find similar
Scandinavian Airlines
Oct 19
IAD10:05 pmWashington, D.C. Dulles Intl
33h 50m
2 stops
LHR12:55 pmLondon Heathrow
Oct 22
LHR7:05 amLondon Heathrow
17h 54m
2 stops
IAD7:59 pmWashington, D.C. Dulles Intl
$528
Find similar

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

Our best Air Canada deals on Washington, D.C. Dulles Intl Airport to London flight tickets
Air Canada
Sep 28
IAD9:35 amWashington, D.C. Dulles Intl
15h 55m
1 stop
LHR6:30 amLondon Heathrow
Oct 7
LHR2:05 pmLondon Heathrow
12h 00m
1 stop
IAD9:05 pmWashington, D.C. Dulles Intl
$534
Find similar
Air Canada
Sep 24
IAD9:35 amWashington, D.C. Dulles Intl
15h 55m
1 stop
LHR6:30 amLondon Heathrow
Oct 2
LHR6:50 amLondon Heathrow
14h 20m
2 stops
IAD4:10 pmWashington, D.C. Dulles Intl
$583
Find similar
Air Canada
Sep 23
IAD3:41 pmWashington, D.C. Dulles Intl
12h 54m
2 stops
LHR9:35 amLondon Heathrow
Sep 30
LHR9:30 amLondon Heathrow
11h 58m
2 stops
IAD4:28 pmWashington, D.C. Dulles Intl
$594
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated September 17, 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

Fri 11/14

7:40 pm-6:20 pm

2 stops17h 40m

London Stansted

Sat 11/22

6:30 am-6:30 pm

2 stops17h 00m

$487

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 11/12

8:30 pm-12:55 pm

2 stops35h 25m

London Heathrow

Sat 11/15

6:40 am-6:50 pm

2 stops17h 10m

$488

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 10/1

11:15 pm-2:40 pm

1 stop10h 25m

London Gatwick

Tue 10/7

3:40 pm-7:20 pm

1 stop32h 40m

$489

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 9/28

11:15 pm-11:55 am

1 stop31h 40m

London Heathrow

Tue 10/7

1:05 pm-7:20 pm

1 stop11h 15m

$489

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 9/28

5:50 pm-6:20 am

Nonstop7h 30m

London Heathrow

Tue 10/7

9:00 am-4:20 pm

1 stop12h 20m

$536

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 10/15

10:25 pm-10:40 am

Nonstop7h 15m

London Heathrow

Tue 10/21

6:50 am-2:25 pm

1 stop12h 35m

$537

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 9/28

5:50 pm-6:20 am

Nonstop7h 30m

London Heathrow

Tue 10/7

6:30 am-3:35 pm

1 stop14h 05m

$538

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Sun 9/28

5:25 pm-8:50 am

1 stop10h 25m

London City

Tue 10/7

10:00 am-3:35 pm

1 stop10h 35m

$639

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Sun 9/28

12:08 pm-7:15 am

2 stops38h 07m

London City

Wed 10/15

10:00 am-3:35 pm

1 stop10h 35m

$642

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Mon 9/22

10:20 pm-4:25 pm

2 stops13h 05m

London City

Fri 10/10

8:55 am-3:50 pm

1 stop11h 55m

$658

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 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 $622, are often lower during this time because this is during the off-season. The month of October is another great option to travel to London, with average flight prices from Washington, D.C. Dulles Intl Airport averaging around $634.

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

The cheapest day to depart from Washington, D.C. Dulles Intl Airport to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $762. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $906. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

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

Flying to London from Washington, D.C. Dulles Intl Airport in the morning is the least expensive time of day to depart. momondo users have found prices as low as $708 when looking at flights departing in the morning. Flights to London are more costly in the afternoon, with an average ticket price of $822. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

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 $756 when searching weeks out. 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 $710 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 September 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 round-trip 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

$384

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 $384. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to London found on momondo in the last 72 hours is $648.
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. By plane, this route typically takes 7h 15m.

  • 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?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to London.

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

    The required travel and health documents for your London trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • 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
PLAYPriceFrom $313Free CancellationRating
7.0
103 reviews
Search PLAY flights
Scandinavian AirlinesPriceFrom $424Free CancellationRating
7.4
1,486 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom $433Free CancellationRating
7.0
545 reviews
Search Icelandair flights
TAP AIR PORTUGALPriceFrom $441Free CancellationRating
7.1
1,977 reviews
Search TAP AIR PORTUGAL flights
LufthansaPriceFrom $447Free CancellationRating
6.8
7,409 reviews
Search Lufthansa flights
British AirwaysPriceFrom $547Free CancellationRating
6.7
7,367 reviews
Search British Airways flights
Air CanadaPriceFrom $549Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
United AirlinesPriceFrom $563Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
Virgin AtlanticPriceFrom $564Free CancellationRating
7.4
664 reviews
Search Virgin Atlantic flights
DeltaPriceFrom $566Free CancellationRating
7.9
7,961 reviews
Search Delta flights

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

    Delta flight deals from Washington, D.C. Dulles Intl Airport to London start from $566 round-trip. Over the 6 Delta flights for this route in a normal week, average airfare is usually $800 round-trip - but some users have found much cheaper deals with momondo.

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

    Another popular option for Washington, D.C. Dulles Intl Airport to London flights is Finnair (7.6/10, 1,324 ratings). Finnair flies from Washington, D.C. Dulles Intl Airport to London around 13 times per week, with deals starting from $591 round-trip and rising to an average price of around $757.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Dover
Luton
Slough
Milton Keynes
Hayes
Guildford
Dartford
Crawley
Stansted
Chelmsford
Brentwood
Ilford
Folkestone
Colchester
Watford
Wembley
Richmond
Croydon

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Washington, D.C..

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

momondo does allow users to show only those flights to London from Washington, D.C. which offer a flexible booking policy as well as other useful filters and features.

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

momondo provides multiple filters to help you find the best flight to London from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Washington, D.C. and alert you when they 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