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Cheap flights from Washington, D.C. Dulles Intl Airport to London from £227

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 17/2. 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
15:37 - 10:00IAD-LGW
13h 23m1 stop
Multiple Airlines Logo
19:45 - 16:30LGW-IAD
25h 45m2 stops
£443Multiple Airlines
Find Deal
Mon, 16 Feb - Mon, 23 Feb
Multiple Airlines Logo
19:40 - 21:20IAD-LGW
20h 40m2 stops
Multiple Airlines Logo
14:35 - 18:30LGW-IAD
32h 55m3 stops
£443Multiple Airlines
Find Deal
Sat, 10 Jan - Fri, 23 Jan
TAP AIR PORTUGAL Logo
17:30 - 09:50IAD-LGW
11h 20m1 stop
TAP AIR PORTUGAL Logo
16:35 - 14:35LGW-IAD
27h 00m1 stop
£445TAP AIR PORTUGAL
Find Deal
Mon, 16 Feb - Mon, 23 Feb
TAP AIR PORTUGAL Logo
22:30 - 15:05IAD-LGW
11h 35m1 stop
TAP AIR PORTUGAL Logo
16:35 - 14:35LGW-IAD
27h 00m1 stop
£446TAP AIR PORTUGAL
Find Deal
Wed, 18 Feb - Mon, 23 Feb
Multiple Airlines Logo
17:30 - 16:55IAD-LGW
18h 25m2 stops
Multiple Airlines Logo
14:00 - 08:40LGW-IAD
23h 40m1 stop
£446Multiple Airlines
Find Deal
Thu, 29 Jan - Thu, 5 Feb
Multiple Airlines Logo
06:00 - 06:00IAD-LGW
19h 00m2 stops
Multiple Airlines Logo
14:00 - 08:33LGW-IAD
23h 33m1 stop
£447Multiple Airlines
Find Deal
Tue, 13 Jan - Sat, 24 Jan
Multiple Airlines Logo
10:03 - 10:05IAD-LGW
19h 02m1 stop
Multiple Airlines Logo
14:00 - 10:44LGW-IAD
25h 44m2 stops
£448Multiple Airlines
Find Deal
Sat, 10 Jan - Fri, 23 Jan
TAP AIR PORTUGAL Logo
17:30 - 20:35IAD-LGW
22h 05m2 stops
TAP AIR PORTUGAL Logo
16:35 - 15:35LGW-IAD
27h 00m1 stop
£449TAP AIR PORTUGAL
Find Deal
Mon, 2 Mar - Mon, 9 Mar
Icelandair Logo
19:40 - 10:55IAD-LGW
10h 15m1 stop
Icelandair Logo
11:55 - 18:30LGW-IAD
11h 35m1 stop
£449Icelandair
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Fri, 20 Feb - Sat, 28 Feb
TAP AIR PORTUGAL Logo
17:30 - 09:50IAD-LGW
11h 20m1 stop
TAP AIR PORTUGAL Logo
11:00 - 14:35LGW-IAD
32h 35m2 stops
£450TAP AIR PORTUGAL
Find Deal
Thu, 11 Dec - Mon, 15 Dec

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
28 Nov
IAD22:30Washington, D.C. Dulles Intl
30h 20m
1 stop
LGW09:50London Gatwick
5 Dec
LGW10:40London Gatwick
15h 20m
1 stop
IAD21:00Washington, D.C. Dulles Intl
£438
Find similar
TAP AIR PORTUGAL
28 Nov
IAD22:30Washington, D.C. Dulles Intl
28h 50m
2 stops
LGW08:20London Gatwick
5 Dec
LGW10:40London Gatwick
15h 20m
1 stop
IAD21:00Washington, D.C. Dulles Intl
£441
Find similar
TAP AIR PORTUGAL
3 Mar
IAD17:30Washington, D.C. Dulles Intl
11h 20m
1 stop
LGW09:50London Gatwick
11 Mar
LGW10:40London Gatwick
15h 20m
1 stop
IAD22:00Washington, D.C. Dulles Intl
£445
Find similar

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

Our best SWISS deals on Washington, D.C. Dulles Intl Airport to London Gatwick Airport flight tickets
SWISS
30 Dec
IAD20:30Washington, D.C. Dulles Intl
16h 20m
1 stop
LGW17:50London Gatwick
9 Jan
LGW18:40London Gatwick
24h 20m
2 stops
IAD14:00Washington, D.C. Dulles Intl
£457
Find similar
SWISS
22 Jan
IAD20:30Washington, D.C. Dulles Intl
16h 20m
1 stop
LGW17:50London Gatwick
25 Jan
LGW18:40London Gatwick
24h 55m
2 stops
IAD14:35Washington, D.C. Dulles Intl
£462
Find similar
SWISS
9 Jan
IAD20:30Washington, D.C. Dulles Intl
16h 20m
1 stop
LGW17:50London Gatwick
14 Jan
LGW18:40London Gatwick
24h 20m
2 stops
IAD14:00Washington, D.C. Dulles Intl
£463
Find similar

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 19 November 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

Mon 16/2

15:37-10:00

1 stop13h 23m

London Gatwick

Mon 23/2

19:45-16:30

2 stops25h 45m

£442

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sat 10/1

19:40-21:20

2 stops20h 40m

London Gatwick

Fri 23/1

14:35-18:30

3 stops32h 55m

£443

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 16/2

17:30-09:50

1 stop11h 20m

London Gatwick

Mon 23/2

16:35-14:35

1 stop27h 00m

£445

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 18/2

22:30-15:05

1 stop11h 35m

London Gatwick

Mon 23/2

16:35-14:35

1 stop27h 00m

£446

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 29/1

17:30-16:55

2 stops18h 25m

London Gatwick

Thu 5/2

14:00-08:40

1 stop23h 40m

£446

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 13/1

06:00-06:00

2 stops19h 00m

London Gatwick

Sat 24/1

14:00-08:33

1 stop23h 33m

£447

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sat 10/1

10:03-10:05

1 stop19h 02m

London Gatwick

Fri 23/1

14:00-10:44

2 stops25h 44m

£448

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 2/3

17:30-20:35

2 stops22h 05m

London Gatwick

Mon 9/3

16:35-15:35

1 stop27h 00m

£449

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 20/2

19:40-10:55

1 stop10h 15m

London Gatwick

Sat 28/2

11:55-18:30

1 stop11h 35m

£449

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 11/12

17:30-09:50

1 stop11h 20m

London Gatwick

Mon 15/12

11:00-14:35

2 stops32h 35m

£450

Flights are sorted by cheapest return 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?

The cheapest month to fly to London Gatwick Airport from Washington, D.C. Dulles Intl Airport is in November. Flight prices, which tend to average around £362, are often lower during this time because this is during the off-season. If you don’t want to visit London Gatwick Airport in November, then you should wait until August to fly from Washington, D.C. Dulles Intl Airport, when ticket prices are also cheap, with an average price of £415.

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

According to our data, Thursday is the cheapest day to fly to London Gatwick Airport from Washington, D.C. Dulles Intl Airport. The lowest ticket price found for a Thursday departure recently was £635. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport on a Saturday will generally be more expensive and average around £844. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

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 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
Maidstone
Slough
Canterbury
Southend-on-Sea
Ipswich
Ilford
Guildford
Dover
Colchester
Chelmsford
Hayes
Worthing
Ramsgate
Dartford
Bedford
Winchester

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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