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Cheap flights from Washington, D.C. Dulles Intl Airport to London from £266

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 19/7. 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 - 19:15
IAD
-
LGW
17h 45m
2 stops
Multiple Airlines Logo
20:50 - 19:20
LGW
-
IAD
27h 30m
3 stops
£496Multiple Airlines
Sun, 26 Apr - Tue, 5 May
Multiple Airlines Logo
20:30 - 19:15
IAD
-
LGW
17h 45m
2 stops
Multiple Airlines Logo
20:50 - 19:20
LGW
-
IAD
27h 30m
3 stops
£503Multiple Airlines
Sun, 26 Apr - Tue, 5 May
Multiple Airlines Logo
20:30 - 22:40
IAD
-
LGW
21h 10m
2 stops
Multiple Airlines Logo
05:55 - 22:15
LGW
-
IAD
21h 20m
2 stops
£506Multiple Airlines
Tue, 5 May - Wed, 13 May
Multiple Airlines Logo
17:15 - 23:20
IAD
-
LGW
25h 05m
2 stops
Multiple Airlines Logo
07:30 - 19:35
LGW
-
IAD
17h 05m
2 stops
£511Multiple Airlines
Tue, 12 May - Tue, 19 May
Multiple Airlines Logo
20:30 - 20:10
IAD
-
LGW
18h 40m
2 stops
Multiple Airlines Logo
14:00 - 18:42
LGW
-
IAD
33h 42m
1 stop
£515Multiple Airlines
Mon, 4 May - Wed, 27 May
Multiple Airlines Logo
20:30 - 19:15
IAD
-
LGW
17h 45m
2 stops
Multiple Airlines Logo
20:50 - 19:20
LGW
-
IAD
27h 30m
3 stops
£516Multiple Airlines
Sun, 26 Apr - Tue, 5 May
Multiple Airlines Logo
20:20 - 19:25
IAD
-
LGW
18h 05m
2 stops
Multiple Airlines Logo
21:15 - 17:00
LGW
-
IAD
24h 45m
2 stops
£517Multiple Airlines
Mon, 27 Apr - Wed, 6 May
Icelandair Logo
20:30 - 14:40
IAD
-
LGW
13h 10m
1 stop
Icelandair Logo
15:40 - 19:20
LGW
-
IAD
32h 40m
1 stop
£517Icelandair
Sat, 26 Sep - Tue, 6 Oct
Multiple Airlines Logo
20:30 - 08:30
IAD
-
LGW
31h 00m
3 stops
Multiple Airlines Logo
05:55 - 22:15
LGW
-
IAD
21h 20m
2 stops
£519Multiple Airlines
Tue, 5 May - Wed, 13 May
Multiple Airlines Logo
23:20 - 18:00
IAD
-
LGW
13h 40m
2 stops
Multiple Airlines Logo
22:00 - 20:29
LGW
-
IAD
27h 29m
3 stops
£520Multiple Airlines
Fri, 8 May - Fri, 15 May

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
12 May
IAD22:35Washington, D.C. Dulles Intl
12h 00m
1 stop
LGW15:35London Gatwick
19 May
LGW16:25London Gatwick
27h 45m
1 stop
IAD15:10Washington, D.C. Dulles Intl
£507
TAP AIR PORTUGAL
12 May
IAD22:35Washington, D.C. Dulles Intl
16h 50m
2 stops
LGW20:25London Gatwick
19 May
LGW16:25London Gatwick
27h 45m
1 stop
IAD15:10Washington, D.C. Dulles Intl
£512
TAP AIR PORTUGAL
20 Apr
IAD22:35Washington, D.C. Dulles Intl
12h 00m
1 stop
LGW15:35London Gatwick
11 May
LGW10:35London Gatwick
15h 00m
1 stop
IAD20:35Washington, D.C. Dulles Intl
£544

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
26 Sept
IAD20:30Washington, D.C. Dulles Intl
13h 10m
1 stop
LGW14:40London Gatwick
6 Oct
LGW15:40London Gatwick
32h 40m
1 stop
IAD19:20Washington, D.C. Dulles Intl
£517
Icelandair
2 Sept
IAD20:30Washington, D.C. Dulles Intl
13h 10m
1 stop
LGW14:40London Gatwick
12 Sept
LGW15:40London Gatwick
11h 35m
1 stop
IAD22:15Washington, D.C. Dulles Intl
£526
Icelandair
25 Apr
IAD20:30Washington, D.C. Dulles Intl
13h 10m
1 stop
LGW14:40London Gatwick
29 Apr
LGW15:40London Gatwick
32h 40m
1 stop
IAD19:20Washington, D.C. Dulles Intl
£529

momondo Fare Finder

 
Customise 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 279,928 searches. Data last updated 15 April 2026.
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

Cheapest return flight

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 26/4

20:30-19:15

2 stops17h 45m

London Gatwick

Tue 5/5

20:50-19:20

3 stops27h 30m

£496

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 26/4

20:30-19:15

2 stops17h 45m

London Gatwick

Tue 5/5

20:50-19:20

3 stops27h 30m

£503

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 5/5

20:30-22:40

2 stops21h 10m

London Gatwick

Wed 13/5

05:55-22:15

2 stops21h 20m

£506

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 12/5

17:15-23:20

2 stops25h 05m

London Gatwick

Tue 19/5

07:30-19:35

2 stops17h 05m

£511

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 4/5

20:30-20:10

2 stops18h 40m

London Gatwick

Wed 27/5

14:00-18:42

1 stop33h 42m

£515

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 26/4

20:30-19:15

2 stops17h 45m

London Gatwick

Tue 5/5

20:50-19:20

3 stops27h 30m

£516

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 27/4

20:20-19:25

2 stops18h 05m

London Gatwick

Wed 6/5

21:15-17:00

2 stops24h 45m

£517

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sat 26/9

20:30-14:40

1 stop13h 10m

London Gatwick

Tue 6/10

15:40-19:20

1 stop32h 40m

£517

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 5/5

20:30-08:30

3 stops31h 00m

London Gatwick

Wed 13/5

05:55-22:15

2 stops21h 20m

£519
Fastest return journey

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 8/5

23:20-18:00

2 stops13h 40m

London Gatwick

Fri 15/5

22:00-20:29

3 stops27h 29m

£520

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

What is the cheapest month to fly to London Gatwick Airport?

The cheapest month to fly to London Gatwick Airport from Washington, D.C. Dulles Intl Airport is in February. Flight prices, which tend to average around £314, are often lower during this time because this is during the off-season. If you don’t want to visit London Gatwick Airport in February, then you should wait until November to fly from Washington, D.C. Dulles Intl Airport, when ticket prices are also cheap, with an average price of £330.

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 return 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

Fastest flight time

10h 15m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to London Gatwick Airport takes 10h 15m
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.
Search flight deals

Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to London Gatwick Airport

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

    The distance between Washington, D.C. Dulles Intl and London Gatwick is about 3682.8 mi. In terms of flight time, this usually takes a little over 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 old do you have to be to fly from Washington, D.C. Dulles Intl Airport to London Gatwick Airport?

    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 Gatwick Airport.

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

    The travel and health documents required for your trip to London Gatwick Airport 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 Gatwick Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Travelling to a place near London?

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

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to London for you.

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

Yes. momondo allows you to filter the results for Washington, D.C. to London flights to just show those with flexible booking policies.

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

Once all potential Washington, D.C. to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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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