Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Washington, D.C. Dulles Intl Airport to London from $246

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 12/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Washington, D.C. Dulles Intl Airport to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
10:30 pm - 9:50 amIAD-LGW
30h 20m1 stop
TAP AIR PORTUGAL Logo
10:45 am - 9:00 pmLGW-IAD
15h 15m2 stops
$559TAP AIR PORTUGAL
Find Deal
Fri, Dec 5 - Fri, Dec 12
Scandinavian Airlines Logo
8:30 pm - 4:25 pmIAD-LHR
14h 55m2 stops
Scandinavian Airlines Logo
10:20 am - 5:15 pmLHR-IAD
11h 55m1 stop
$559Scandinavian Airlines
Find Deal
Wed, Feb 4 - Wed, Feb 11
Icelandair Logo
7:40 pm - 10:50 amIAD-LHR
10h 10m1 stop
Icelandair Logo
8:35 pm - 6:30 pmLHR-IAD
26h 55m1 stop
$564Icelandair
Find Deal
Thu, Dec 11 - Sun, Dec 21
Icelandair Logo
7:40 pm - 10:55 amIAD-LGW
10h 15m1 stop
Icelandair Logo
11:55 am - 6:30 pmLGW-IAD
11h 35m1 stop
$567Icelandair
Find Deal
Tue, Nov 4 - Wed, Nov 12
Virgin Atlantic Logo
10:20 pm - 10:50 amIAD-LHR
7h 30mnonstop
Virgin Atlantic Logo
8:55 am - 4:35 pmLHR-IAD
12h 40m1 stop
$579Virgin Atlantic
Find Deal
Sun, Nov 9 - Fri, Dec 5
British Airways Logo
6:20 pm - 6:30 amIAD-LHR
7h 10mnonstop
British Airways Logo
4:25 pm - 7:55 pmLHR-IAD
8h 30mnonstop
$580British Airways
Find Deal
Wed, Nov 12 - Wed, Nov 19
British Airways Logo
6:20 pm - 6:30 amIAD-LHR
7h 10mnonstop
British Airways Logo
4:25 pm - 7:55 pmLHR-IAD
8h 30mnonstop
$594British Airways
Find Deal
Wed, Feb 4 - Wed, Feb 11
Virgin Atlantic Logo
10:20 pm - 10:50 amIAD-LHR
7h 30mnonstop
Virgin Atlantic Logo
4:50 pm - 8:30 pmLHR-IAD
8h 40mnonstop
$595Virgin Atlantic
Find Deal
Fri, Dec 5 - Fri, Dec 12
United Airlines Logo
6:20 pm - 6:40 amIAD-LHR
7h 20mnonstop
United Airlines Logo
11:10 am - 8:05 pmLHR-IAD
13h 55m1 stop
$605United Airlines
Find Deal
Tue, Nov 25 - Wed, Dec 3
United Airlines Logo
9:45 am - 7:10 amIAD-LHR
16h 25m1 stop
United Airlines Logo
12:05 pm - 4:40 pmLHR-IAD
33h 35m1 stop
$606United Airlines
Find Deal
Wed, Nov 19 - Mon, Nov 24

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
Feb 4
IAD8:30 pmWashington, D.C. Dulles Intl
14h 55m
2 stops
LHR4:25 pmLondon Heathrow
Feb 11
LHR10:20 amLondon Heathrow
11h 55m
1 stop
IAD5:15 pmWashington, D.C. Dulles Intl
$559
Find similar
Scandinavian Airlines
Nov 17
IAD12:11 pmWashington, D.C. Dulles Intl
22h 49m
2 stops
LHR4:00 pmLondon Heathrow
Nov 24
LHR6:40 amLondon Heathrow
15h 35m
2 stops
IAD5:15 pmWashington, D.C. Dulles Intl
$562
Find similar
Scandinavian Airlines
Feb 11
IAD8:30 pmWashington, D.C. Dulles Intl
20h 10m
1 stop
LHR9:40 pmLondon Heathrow
Feb 17
LHR7:50 pmLondon Heathrow
26h 25m
2 stops
IAD5:15 pmWashington, D.C. Dulles Intl
$563
Find similar

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
Oct 26
IAD11:20 pmWashington, D.C. Dulles Intl
7h 30m
LHR10:50 amLondon Heathrow
Nov 4
LHR10:00 amLondon Heathrow
11h 05m
1 stop
IAD4:05 pmWashington, D.C. Dulles Intl
$560
Find similar
Virgin Atlantic
Oct 26
IAD11:20 pmWashington, D.C. Dulles Intl
7h 30m
LHR10:50 amLondon Heathrow
Nov 4
LHR11:30 amLondon Heathrow
12h 45m
1 stop
IAD7:15 pmWashington, D.C. Dulles Intl
$562
Find similar
Virgin Atlantic
Oct 26
IAD11:20 pmWashington, D.C. Dulles Intl
7h 30m
LHR10:50 amLondon Heathrow
Nov 4
LHR8:55 amLondon Heathrow
12h 40m
1 stop
IAD4:35 pmWashington, D.C. Dulles Intl
$563
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 October 23, 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 - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 12/5

10:30 pm-9:50 am

1 stop30h 20m

London Gatwick

Fri 12/12

10:45 am-9:00 pm

2 stops15h 15m

$559

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 2/4

8:30 pm-4:25 pm

2 stops14h 55m

London Heathrow

Wed 2/11

10:20 am-5:15 pm

1 stop11h 55m

$559

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 12/11

7:40 pm-10:50 am

1 stop10h 10m

London Heathrow

Sun 12/21

8:35 pm-6:30 pm

1 stop26h 55m

$564

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 11/4

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Wed 11/12

11:55 am-6:30 pm

1 stop11h 35m

$567

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 11/9

10:20 pm-10:50 am

Nonstop7h 30m

London Heathrow

Fri 12/5

8:55 am-4:35 pm

1 stop12h 40m

$579

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 11/12

6:20 pm-6:30 am

Nonstop7h 10m

London Heathrow

Wed 11/19

4:25 pm-7:55 pm

Nonstop8h 30m

$580

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 2/4

6:20 pm-6:30 am

Nonstop7h 10m

London Heathrow

Wed 2/11

4:25 pm-7:55 pm

Nonstop8h 30m

$594

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Fri 12/5

10:20 pm-10:50 am

Nonstop7h 30m

London Heathrow

Fri 12/12

4:50 pm-8:30 pm

Nonstop8h 40m

$595

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 11/25

6:20 pm-6:40 am

Nonstop7h 20m

London Heathrow

Wed 12/3

11:10 am-8:05 pm

1 stop13h 55m

$605

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 11/19

9:45 am-7:10 am

1 stop16h 25m

London Heathrow

Mon 11/24

12:05 pm-4:40 pm

1 stop33h 35m

$606

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $625, 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 $633.

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 $766. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $905. 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 evening is the least expensive time of day to depart. momondo users have found prices as low as $817 when looking at flights departing in the evening. Flights to London are more costly in the afternoon, with an average ticket price of $823. 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 $759 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 $705 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 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

$387

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 $387. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to London found on momondo in the last 72 hours is $695.
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 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?

    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 $372Free CancellationRating
7.0
103 reviews
Search PLAY flights
TAP AIR PORTUGALPriceFrom $395Free CancellationRating
7.1
2,030 reviews
Search TAP AIR PORTUGAL flights
LufthansaPriceFrom $397Free CancellationRating
6.8
7,518 reviews
Search Lufthansa flights
Scandinavian AirlinesPriceFrom $424Free CancellationRating
7.4
1,538 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom $433Free CancellationRating
7.1
561 reviews
Search Icelandair flights
British AirwaysPriceFrom $546Free CancellationRating
6.7
7,469 reviews
Search British Airways flights
Air CanadaPriceFrom $549Free CancellationRating
7.1
10,351 reviews
Search Air Canada flights
DeltaPriceFrom $560Free CancellationRating
7.9
7,982 reviews
Search Delta flights
Virgin AtlanticPriceFrom $562Free CancellationRating
7.5
670 reviews
Search Virgin Atlantic flights
United AirlinesPriceFrom $563Free CancellationRating
7.4
8,995 reviews
Search United Airlines 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 $560 round-trip. Over the 1 Delta flight for this route in a normal week, average airfare is usually $833 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, 1,333 ratings). Finnair flies from Washington, D.C. Dulles Intl Airport to London around 5 times per week, with deals starting from $600 round-trip and rising to an average price of around $755.

Traveling to a place near London?

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

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.

An easier way to manage your London trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 11/22
Sat 11/29
By creating a price alert you accept our terms of use and privacy policy.

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