Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Washington, D.C. Dulles Intl Airport to London from £196

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 27/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Washington, D.C. Dulles Intl Airport to London

Cheap return flights

Icelandair Logo
23:15 - 14:40IAD-LGW
10h 25m1 stop
Icelandair Logo
15:40 - 19:20LGW-IAD
32h 40m1 stop
£358Icelandair
Find Deal
Wed, 1 Oct - Tue, 7 Oct
Icelandair Logo
23:15 - 14:35IAD-LGW
10h 20m1 stop
Icelandair Logo
15:40 - 19:20LGW-IAD
32h 40m1 stop
£360Icelandair
Find Deal
Sat, 4 Oct - Tue, 14 Oct
Icelandair Logo
23:15 - 14:40IAD-LGW
10h 25m1 stop
Icelandair Logo
15:40 - 19:20LGW-IAD
32h 40m1 stop
£360Icelandair
Find Deal
Sun, 12 Oct - Tue, 21 Oct
Icelandair Logo
23:15 - 14:40IAD-LGW
10h 25m1 stop
Icelandair Logo
15:40 - 22:10LGW-IAD
11h 30m1 stop
£361Icelandair
Find Deal
Fri, 3 Oct - Sat, 11 Oct
Icelandair Logo
23:15 - 14:40IAD-LGW
10h 25m1 stop
Icelandair Logo
15:40 - 22:10LGW-IAD
11h 30m1 stop
£362Icelandair
Find Deal
Wed, 1 Oct - Wed, 15 Oct
Icelandair Logo
20:30 - 14:40IAD-LGW
13h 10m1 stop
Icelandair Logo
15:40 - 19:20LGW-IAD
32h 40m1 stop
£363Icelandair
Find Deal
Tue, 30 Sep - Tue, 7 Oct
TAP AIR PORTUGAL Logo
22:30 - 15:05IAD-LGW
11h 35m1 stop
TAP AIR PORTUGAL Logo
10:40 - 21:00LGW-IAD
15h 20m1 stop
£371TAP AIR PORTUGAL
Find Deal
Wed, 7 Jan - Wed, 14 Jan
Multiple Airlines Logo
08:40 - 06:00IAD-LGW
40h 20m2 stops
Multiple Airlines Logo
14:00 - 07:35LGW-IAD
22h 35m1 stop
£373Multiple Airlines
Find Deal
Tue, 4 Nov - Fri, 5 Dec
TAP AIR PORTUGAL Logo
17:00 - 11:20IAD-LGW
13h 20m2 stops
TAP AIR PORTUGAL Logo
16:25 - 15:20LGW-IAD
27h 55m1 stop
£376TAP AIR PORTUGAL
Find Deal
Tue, 14 Oct - Tue, 21 Oct
TAP AIR PORTUGAL Logo
22:20 - 20:25IAD-LGW
17h 05m2 stops
TAP AIR PORTUGAL Logo
16:25 - 15:20LGW-IAD
27h 55m1 stop
£377TAP AIR PORTUGAL
Find Deal
Mon, 13 Oct - Tue, 21 Oct

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
1 Oct
IAD23:15Washington, D.C. Dulles Intl
10h 25m
1 stop
LGW14:40London Gatwick
7 Oct
LGW15:40London Gatwick
32h 40m
1 stop
IAD19:20Washington, D.C. Dulles Intl
£358
Find similar
Icelandair
4 Oct
IAD23:15Washington, D.C. Dulles Intl
10h 20m
1 stop
LGW14:35London Gatwick
14 Oct
LGW15:40London Gatwick
32h 40m
1 stop
IAD19:20Washington, D.C. Dulles Intl
£360
Find similar
Icelandair
12 Oct
IAD23:15Washington, D.C. Dulles Intl
10h 25m
1 stop
LGW14:40London Gatwick
21 Oct
LGW15:40London Gatwick
32h 40m
1 stop
IAD19:20Washington, D.C. Dulles Intl
£360
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
1 Oct
IAD20:45Washington, D.C. Dulles Intl
16h 10m
1 stop
LGW17:55London Gatwick
7 Oct
LGW18:35London Gatwick
26h 40m
1 stop
IAD16:15Washington, D.C. Dulles Intl
£413
Find similar
SWISS
28 Sept
IAD20:45Washington, D.C. Dulles Intl
16h 05m
1 stop
LGW17:50London Gatwick
7 Oct
LGW18:35London Gatwick
26h 40m
1 stop
IAD16:15Washington, D.C. Dulles Intl
£424
Find similar
SWISS
28 Sept
IAD20:45Washington, D.C. Dulles Intl
16h 05m
1 stop
LGW17:50London Gatwick
7 Oct
LGW18:35London Gatwick
26h 40m
1 stop
IAD16:15Washington, D.C. Dulles Intl
£428
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 September 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

Wed 1/10

23:15-14:40

1 stop10h 25m

London Gatwick

Tue 7/10

15:40-19:20

1 stop32h 40m

£358

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sat 4/10

23:15-14:35

1 stop10h 20m

London Gatwick

Tue 14/10

15:40-19:20

1 stop32h 40m

£360

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 12/10

23:15-14:40

1 stop10h 25m

London Gatwick

Tue 21/10

15:40-19:20

1 stop32h 40m

£360

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 3/10

23:15-14:40

1 stop10h 25m

London Gatwick

Sat 11/10

15:40-22:10

1 stop11h 30m

£361

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 1/10

23:15-14:40

1 stop10h 25m

London Gatwick

Wed 15/10

15:40-22:10

1 stop11h 30m

£362

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 30/9

20:30-14:40

1 stop13h 10m

London Gatwick

Tue 7/10

15:40-19:20

1 stop32h 40m

£363

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 7/1

22:30-15:05

1 stop11h 35m

London Gatwick

Wed 14/1

10:40-21:00

1 stop15h 20m

£371

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 4/11

08:40-06:00

2 stops40h 20m

London Gatwick

Fri 5/12

14:00-07:35

1 stop22h 35m

£373

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 14/10

17:00-11:20

2 stops13h 20m

London Gatwick

Tue 21/10

16:25-15:20

1 stop27h 55m

£376

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 13/10

22:20-20:25

2 stops17h 05m

London Gatwick

Tue 21/10

16:25-15:20

1 stop27h 55m

£377

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 November. Flight prices, which tend to average around £368, 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 £400.

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 £612. 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 £813. 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.
Search flight deals

  • 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
Luton
Milton Keynes
Maidstone
Gatwick
Slough
Canterbury
Southend-on-Sea
Ipswich
Ilford
Guildford
Colchester
Worthing
Chelmsford
Dover
Hayes
Dartford
Winchester
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.

An easier way to manage your London Gatwick Airport trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 18/10
Sat 25/10
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to London