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Cheap flights from Washington, D.C. Dulles Intl Airport to London from $249

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 10/22. 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

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
10:30 pm - 3:45 pmIAD-LGW
12h 15m1 stop
TAP AIR PORTUGAL Logo
4:35 pm - 9:00 pmLGW-IAD
33h 25m1 stop
$563TAP AIR PORTUGAL
Find Deal
Sun, Dec 7 - Sat, Dec 13
TAP AIR PORTUGAL Logo
10:30 pm - 9:50 amIAD-LGW
30h 20m1 stop
TAP AIR PORTUGAL Logo
4:35 pm - 2:35 pmLGW-IAD
27h 00m1 stop
$564TAP AIR PORTUGAL
Find Deal
Wed, Jan 14 - Mon, Jan 19
TAP AIR PORTUGAL Logo
10:30 pm - 9:50 amIAD-LGW
30h 20m1 stop
TAP AIR PORTUGAL Logo
4:35 pm - 2:35 pmLGW-IAD
27h 00m1 stop
$565TAP AIR PORTUGAL
Find Deal
Wed, Jan 14 - Mon, Jan 19
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
Wed, Jan 7 - Tue, Jan 20
Multiple Airlines Logo
9:45 am - 8:15 pmIAD-LGW
29h 30m3 stops
Multiple Airlines Logo
10:10 am - 4:40 pmLGW-IAD
35h 30m2 stops
$568Multiple Airlines
Find Deal
Tue, Nov 25 - Mon, Dec 1
Multiple Airlines Logo
4:30 pm - 5:15 pmIAD-LGW
19h 45m2 stops
Multiple Airlines Logo
4:20 pm - 3:50 pmLGW-IAD
28h 30m2 stops
$569Multiple Airlines
Find Deal
Tue, Dec 2 - Mon, Dec 8
Icelandair Logo
7:40 pm - 10:55 amIAD-LGW
10h 15m1 stop
Icelandair Logo
11:55 am - 6:30 pmLGW-IAD
11h 35m1 stop
$577Icelandair
Find Deal
Tue, Dec 30 - Tue, Jan 13
SWISS Logo
8:30 pm - 5:50 pmIAD-LGW
16h 20m1 stop
SWISS Logo
6:40 pm - 4:40 pmLGW-IAD
27h 00m1 stop
$591SWISS
Find Deal
Sun, Nov 23 - Wed, Dec 3
SWISS Logo
8:30 pm - 5:50 pmIAD-LGW
16h 20m1 stop
SWISS Logo
6:40 pm - 4:40 pmLGW-IAD
27h 00m1 stop
$592SWISS
Find Deal
Sun, Nov 9 - Wed, Nov 19
Turkish Airlines Logo
9:15 pm - 10:35 pmIAD-LGW
20h 20m1 stop
Turkish Airlines Logo
10:15 am - 7:20 pmLGW-IAD
38h 05m1 stop
$621Turkish Airlines
Find Deal
Wed, Nov 12 - Wed, Nov 19

TAP AIR PORTUGAL flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport

Our best TAP AIR PORTUGAL deals on Washington, D.C. Dulles Intl Airport to London Gatwick Airport flight tickets
TAP AIR PORTUGAL
Dec 7
IAD10:30 pmWashington, D.C. Dulles Intl
12h 15m
1 stop
LGW3:45 pmLondon Gatwick
Dec 13
LGW4:35 pmLondon Gatwick
33h 25m
1 stop
IAD9:00 pmWashington, D.C. Dulles Intl
$563
Find similar
TAP AIR PORTUGAL
Jan 14
IAD10:30 pmWashington, D.C. Dulles Intl
30h 20m
1 stop
LGW9:50 amLondon Gatwick
Jan 19
LGW4:35 pmLondon Gatwick
27h 00m
1 stop
IAD2:35 pmWashington, D.C. Dulles Intl
$564
Find similar
TAP AIR PORTUGAL
Jan 14
IAD10:30 pmWashington, D.C. Dulles Intl
30h 20m
1 stop
LGW9:50 amLondon Gatwick
Jan 19
LGW4:35 pmLondon Gatwick
27h 00m
1 stop
IAD2:35 pmWashington, D.C. Dulles Intl
$565
Find similar

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

Our best Icelandair deals on Washington, D.C. Dulles Intl Airport to London Gatwick Airport flight tickets
Icelandair
Jan 7
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
Jan 20
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
$567
Find similar
Icelandair
Dec 30
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
Jan 13
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
$577
Find similar
Icelandair
Dec 25
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
Jan 16
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
$581
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport 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 20, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport 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

Sun 12/7

10:30 pm-3:45 pm

1 stop12h 15m

London Gatwick

Sat 12/13

4:35 pm-9:00 pm

1 stop33h 25m

$563

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 1/14

10:30 pm-9:50 am

1 stop30h 20m

London Gatwick

Mon 1/19

4:35 pm-2:35 pm

1 stop27h 00m

$564

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 1/14

10:30 pm-9:50 am

1 stop30h 20m

London Gatwick

Mon 1/19

4:35 pm-2:35 pm

1 stop27h 00m

$565

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 1/7

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Tue 1/20

11:55 am-6:30 pm

1 stop11h 35m

$567

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 11/25

9:45 am-8:15 pm

3 stops29h 30m

London Gatwick

Mon 12/1

10:10 am-4:40 pm

2 stops35h 30m

$568

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 12/2

4:30 pm-5:15 pm

2 stops19h 45m

London Gatwick

Mon 12/8

4:20 pm-3:50 pm

2 stops28h 30m

$569

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 12/30

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Tue 1/13

11:55 am-6:30 pm

1 stop11h 35m

$577

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 11/23

8:30 pm-5:50 pm

1 stop16h 20m

London Gatwick

Wed 12/3

6:40 pm-4:40 pm

1 stop27h 00m

$591

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 11/9

8:30 pm-5:50 pm

1 stop16h 20m

London Gatwick

Wed 11/19

6:40 pm-4:40 pm

1 stop27h 00m

$592

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 11/12

9:15 pm-10:35 pm

1 stop20h 20m

London Gatwick

Wed 11/19

10:15 am-7:20 pm

1 stop38h 05m

$621

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 Gatwick Airport

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 Gatwick Airport?

In general, November is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to London Gatwick Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $491. If you are unable to visit London Gatwick Airport during the month of November, then departing from Washington, D.C. Dulles Intl Airport during the month August is also very affordable. Most momondo users find prices during this month for around $546.

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

The cheapest day to depart from Washington, D.C. Dulles Intl Airport to London Gatwick Airport is on a Wednesday when prices can be found for as low as $674. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Gatwick Airport on Saturday is $885.

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

Flying to London Gatwick Airport 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 $694 when looking at flights departing in the evening. At noon is when there is more demand to fly to London Gatwick Airport, so prices are often more expensive at around $819 per ticket.

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

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to London Gatwick Airport 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 Gatwick Airport (IAD to LGW) 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 Gatwick Airport

Direct flights

None
There are no direct flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to London Gatwick Airport.
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  • How far is Washington, D.C. Dulles Intl to London Gatwick by plane?

    The straight-line distance from Washington, D.C. Dulles Intl to London Gatwick is 3682.8 mi. By plane, this route typically takes 10h 15m.

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

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

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

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

    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 Gatwick Airport.

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

    The travel and health documents you'll need for your trip to London Gatwick Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Gatwick Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

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

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to London Gatwick Airport with momondo
Airline
Rating
Free Cancellation
Price
TAP AIR PORTUGALPriceFrom $425Free CancellationRating
7.1
2,022 reviews
Search TAP AIR PORTUGAL flights
IcelandairPriceFrom $491Free CancellationRating
7.0
561 reviews
Search Icelandair flights

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
Dartford
Crawley
Hayes
Brentwood
Chelmsford
Colchester
Folkestone
Romford
Ilford
Cobham
Wembley
Stansted
Watford

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington, D.C. to London. Millions of users trust and use momondo every year so you are in good hands.

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?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington, D.C. to London.

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 can track prices for Washington, D.C. to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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