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Cheap flights from Washington, D.C. Dulles Intl Airport to London from £280

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 16/2. 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.
TAP AIR PORTUGAL Logo
17:05 - 20:25
IAD
-
LGW
22h 20m2 stops
TAP AIR PORTUGAL Logo
10:35 - 20:35
LGW
-
IAD
15h 00m1 stop
£431TAP AIR PORTUGAL
Fri, 17 Apr - Wed, 22 Apr
Icelandair Logo
19:40 - 10:55
IAD
-
LGW
10h 15m1 stop
Icelandair Logo
11:55 - 18:30
LGW
-
IAD
11h 35m1 stop
£432Icelandair
Sun, 11 Jan - Tue, 20 Jan
TAP AIR PORTUGAL Logo
17:05 - 09:45
IAD
-
LGW
11h 40m1 stop
TAP AIR PORTUGAL Logo
21:15 - 20:35
LGW
-
IAD
28h 20m2 stops
£433TAP AIR PORTUGAL
Fri, 1 May - Sun, 3 May
TAP AIR PORTUGAL Logo
22:30 - 15:45
IAD
-
LGW
12h 15m1 stop
TAP AIR PORTUGAL Logo
09:05 - 21:00
LGW
-
IAD
16h 55m2 stops
£434TAP AIR PORTUGAL
Fri, 23 Jan - Sun, 1 Feb
SWISS Logo
17:25 - 17:50
IAD
-
LGW
19h 25m1 stop
SWISS Logo
18:40 - 16:40
LGW
-
IAD
27h 00m1 stop
£434SWISS
Wed, 14 Jan - Wed, 21 Jan
TAP AIR PORTUGAL Logo
22:35 - 20:25
IAD
-
LGW
16h 50m2 stops
TAP AIR PORTUGAL Logo
16:25 - 20:35
LGW
-
IAD
33h 10m1 stop
£437TAP AIR PORTUGAL
Thu, 16 Apr - Tue, 21 Apr
TAP AIR PORTUGAL Logo
17:30 - 09:50
IAD
-
LGW
11h 20m1 stop
TAP AIR PORTUGAL Logo
16:35 - 21:00
LGW
-
IAD
33h 25m1 stop
£437TAP AIR PORTUGAL
Sat, 14 Feb - Sat, 21 Feb
TAP AIR PORTUGAL Logo
22:35 - 15:35
IAD
-
LGW
12h 00m1 stop
TAP AIR PORTUGAL Logo
10:35 - 20:35
LGW
-
IAD
15h 00m1 stop
£438TAP AIR PORTUGAL
Tue, 5 May - Sun, 10 May
TAP AIR PORTUGAL Logo
22:35 - 20:30
IAD
-
LGW
16h 55m2 stops
TAP AIR PORTUGAL Logo
10:35 - 20:35
LGW
-
IAD
15h 00m1 stop
£439TAP AIR PORTUGAL
Wed, 15 Apr - Wed, 22 Apr
TAP AIR PORTUGAL Logo
22:30 - 15:45
IAD
-
LGW
12h 15m1 stop
TAP AIR PORTUGAL Logo
16:35 - 21:00
LGW
-
IAD
33h 25m1 stop
£440TAP AIR PORTUGAL
Sun, 15 Feb - Sat, 21 Feb

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
17 Apr
IAD17:05Washington, D.C. Dulles Intl
22h 20m
2 stops
LGW20:25London Gatwick
22 Apr
LGW10:35London Gatwick
15h 00m
1 stop
IAD20:35Washington, D.C. Dulles Intl
£431
Find similar
TAP AIR PORTUGAL
1 May
IAD17:05Washington, D.C. Dulles Intl
11h 40m
1 stop
LGW09:45London Gatwick
3 May
LGW21:15London Gatwick
28h 20m
2 stops
IAD20:35Washington, D.C. Dulles Intl
£433
Find similar
TAP AIR PORTUGAL
23 Jan
IAD22:30Washington, D.C. Dulles Intl
12h 15m
1 stop
LGW15:45London Gatwick
1 Feb
LGW09:05London Gatwick
16h 55m
2 stops
IAD21:00Washington, D.C. Dulles Intl
£434
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
14 Jan
IAD17:25Washington, D.C. Dulles Intl
19h 25m
1 stop
LGW17:50London Gatwick
21 Jan
LGW18:40London Gatwick
27h 00m
1 stop
IAD16:40Washington, D.C. Dulles Intl
£434
Find similar
SWISS
18 Mar
IAD17:25Washington, D.C. Dulles Intl
20h 25m
1 stop
LGW17:50London Gatwick
25 Mar
LGW18:40London Gatwick
24h 45m
1 stop
IAD15:25Washington, D.C. Dulles Intl
£442
Find similar
SWISS
25 Mar
IAD17:25Washington, D.C. Dulles Intl
20h 25m
1 stop
LGW17:50London Gatwick
2 Apr
LGW18:35London Gatwick
27h 10m
1 stop
IAD16:45Washington, D.C. Dulles Intl
£446
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 18 December 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

Fri 17/4

17:05-20:25

2 stops22h 20m

London Gatwick

Wed 22/4

10:35-20:35

1 stop15h 00m

£431

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 11/1

19:40-10:55

1 stop10h 15m

London Gatwick

Tue 20/1

11:55-18:30

1 stop11h 35m

£432

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 1/5

17:05-09:45

1 stop11h 40m

London Gatwick

Sun 3/5

21:15-20:35

2 stops28h 20m

£433

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 23/1

22:30-15:45

1 stop12h 15m

London Gatwick

Sun 1/2

09:05-21:00

2 stops16h 55m

£434

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 14/1

17:25-17:50

1 stop19h 25m

London Gatwick

Wed 21/1

18:40-16:40

1 stop27h 00m

£434

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 16/4

22:35-20:25

2 stops16h 50m

London Gatwick

Tue 21/4

16:25-20:35

1 stop33h 10m

£437

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sat 14/2

17:30-09:50

1 stop11h 20m

London Gatwick

Sat 21/2

16:35-21:00

1 stop33h 25m

£437

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 5/5

22:35-15:35

1 stop12h 00m

London Gatwick

Sun 10/5

10:35-20:35

1 stop15h 00m

£438

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 15/4

22:35-20:30

2 stops16h 55m

London Gatwick

Wed 22/4

10:35-20:35

1 stop15h 00m

£439

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 15/2

22:30-15:45

1 stop12h 15m

London Gatwick

Sat 21/2

16:35-21:00

1 stop33h 25m

£440

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 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 £334, 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 September to fly from Washington, D.C. Dulles Intl Airport, when ticket prices are also cheap, with an average price of £378.

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 £624. 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 £830. 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

Fastest flight time

10h 05m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to London Gatwick Airport takes 10h 05m
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 05m.

  • 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
Southend-on-Sea
Canterbury
Ipswich
Ilford
Guildford
Hayes
Chelmsford
Dover
Worthing
Colchester
Bedford
Ramsgate
Hounslow
Stansted

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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