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Cheap flights from Washington, D.C. Dulles Intl Airport to London from £324

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 26/7. 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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0 bags
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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
11:30 - 07:55
IAD
-
LGW
15h 25m
2 stops
Multiple Airlines Logo
11:35 - 15:16
LGW
-
IAD
32h 41m
2 stops
£627Multiple Airlines
Sun, 21 Jun - Wed, 24 Jun
Multiple Airlines Logo
08:18 - 09:50
IAD
-
LGW
20h 32m
3 stops
Multiple Airlines Logo
09:40 - 16:12
LGW
-
IAD
35h 32m
2 stops
£628Multiple Airlines
Tue, 16 Jun - Tue, 23 Jun
Multiple Airlines Logo
08:18 - 09:50
IAD
-
LGW
20h 32m
3 stops
Multiple Airlines Logo
11:35 - 10:46
LGW
-
IAD
28h 11m
2 stops
£629Multiple Airlines
Tue, 16 Jun - Tue, 23 Jun
TAP AIR PORTUGAL Logo
17:05 - 09:45
IAD
-
LGW
11h 40m
1 stop
TAP AIR PORTUGAL Logo
21:15 - 15:10
LGW
-
IAD
22h 55m
2 stops
£630TAP AIR PORTUGAL
Sat, 15 Aug - Tue, 25 Aug
Multiple Airlines Logo
08:18 - 09:50
IAD
-
LGW
20h 32m
3 stops
Multiple Airlines Logo
09:40 - 15:16
LGW
-
IAD
34h 36m
2 stops
£630Multiple Airlines
Tue, 16 Jun - Fri, 19 Jun
Icelandair Logo
20:30 - 14:40
IAD
-
LGW
13h 10m
1 stop
Icelandair Logo
13:00 - 19:20
LGW
-
IAD
11h 20m
1 stop
£631Icelandair
Thu, 20 Aug - Thu, 27 Aug
Multiple Airlines Logo
15:45 - 10:45
IAD
-
LGW
14h 00m
2 stops
Multiple Airlines Logo
12:40 - 20:29
LGW
-
IAD
12h 49m
1 stop
£632Multiple Airlines
Sun, 31 May - Sat, 6 Jun
Icelandair Logo
20:30 - 14:40
IAD
-
LGW
13h 10m
1 stop
Icelandair Logo
15:40 - 19:20
LGW
-
IAD
32h 40m
1 stop
£633Icelandair
Sun, 19 Jul - Mon, 27 Jul
Multiple Airlines Logo
22:10 - 09:50
IAD
-
LGW
30h 40m
3 stops
Multiple Airlines Logo
11:35 - 10:46
LGW
-
IAD
28h 11m
2 stops
£633Multiple Airlines
Wed, 17 Jun - Wed, 24 Jun
SWISS Logo
20:20 - 17:55
IAD
-
LGW
16h 35m
1 stop
SWISS Logo
09:25 - 16:45
LGW
-
IAD
12h 20m
1 stop
£634SWISS
Wed, 29 Jul - Wed, 12 Aug

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
15 Aug
IAD17:05Washington, D.C. Dulles Intl
11h 40m
1 stop
LGW09:45London Gatwick
25 Aug
LGW21:15London Gatwick
22h 55m
2 stops
IAD15:10Washington, D.C. Dulles Intl
£630
TAP AIR PORTUGAL
15 Aug
IAD17:05Washington, D.C. Dulles Intl
11h 40m
1 stop
LGW09:45London Gatwick
25 Aug
LGW16:25London Gatwick
27h 45m
1 stop
IAD15:10Washington, D.C. Dulles Intl
£639
TAP AIR PORTUGAL
28 Oct
IAD23:30Washington, D.C. Dulles Intl
11h 35m
1 stop
LGW15:05London Gatwick
4 Nov
LGW09:35London Gatwick
16h 00m
2 stops
IAD20:35Washington, D.C. Dulles Intl
£648

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
20 Aug
IAD20:30Washington, D.C. Dulles Intl
13h 10m
1 stop
LGW14:40London Gatwick
27 Aug
LGW13:00London Gatwick
11h 20m
1 stop
IAD19:20Washington, D.C. Dulles Intl
£631
Icelandair
19 Jul
IAD20:30Washington, D.C. Dulles Intl
13h 10m
1 stop
LGW14:40London Gatwick
27 Jul
LGW15:40London Gatwick
32h 40m
1 stop
IAD19:20Washington, D.C. Dulles Intl
£633
Icelandair
23 Jul
IAD20:30Washington, D.C. Dulles Intl
13h 10m
1 stop
LGW14:40London Gatwick
27 Jul
LGW15:40London Gatwick
32h 40m
1 stop
IAD19:20Washington, D.C. Dulles Intl
£635

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 20 May 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 21/6

11:30-07:55

2 stops15h 25m

London Gatwick

Wed 24/6

11:35-15:16

2 stops32h 41m

£627

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 16/6

08:18-09:50

3 stops20h 32m

London Gatwick

Tue 23/6

09:40-16:12

2 stops35h 32m

£628

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 16/6

08:18-09:50

3 stops20h 32m

London Gatwick

Tue 23/6

11:35-10:46

2 stops28h 11m

£629

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sat 15/8

17:05-09:45

1 stop11h 40m

London Gatwick

Tue 25/8

21:15-15:10

2 stops22h 55m

£630

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 16/6

08:18-09:50

3 stops20h 32m

London Gatwick

Fri 19/6

09:40-15:16

2 stops34h 36m

£630
Fastest return journey

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 20/8

20:30-14:40

1 stop13h 10m

London Gatwick

Thu 27/8

13:00-19:20

1 stop11h 20m

£631

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 31/5

15:45-10:45

2 stops14h 00m

London Gatwick

Sat 6/6

12:40-20:29

1 stop12h 49m

£632

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 19/7

20:30-14:40

1 stop13h 10m

London Gatwick

Mon 27/7

15:40-19:20

1 stop32h 40m

£633

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 17/6

22:10-09:50

3 stops30h 40m

London Gatwick

Wed 24/6

11:35-10:46

2 stops28h 11m

£633

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 29/7

20:20-17:55

1 stop16h 35m

London Gatwick

Wed 12/8

09:25-16:45

1 stop12h 20m

£634

Flights are sorted by cheapest return 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 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 £318, 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 £333.

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.
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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
Wembley
Slough
Maidstone
Ipswich
Southend-on-Sea
Canterbury
Ilford
Hayes
Guildford
Folkestone
Chelmsford
Dover
Bedford
Chichester
Harlow
Colchester

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.

An easier way to manage your London Gatwick Airport trip

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