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Cheap flights from London Gatwick Airport to Washington, D.C. from £352

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Gatwick Airport to Washington, D.C. departing on 6/10. 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 London Gatwick Airport to Washington, D.C.

Cheap return flights

American Airlines Logo
15:05 - 23:07LGW-DCA
13h 02m1 stop
American Airlines Logo
15:35 - 07:50DCA-LGW
11h 15m1 stop
£395American Airlines
Find Deal
Fri, 3 Oct - Sun, 5 Oct
Multiple Airlines Logo
08:55 - 18:55LGW-IAD
15h 00m1 stop
Multiple Airlines Logo
18:05 - 09:15IAD-LGW
11h 10m1 stop
£396Multiple Airlines
Find Deal
Thu, 23 Oct - Mon, 27 Oct
Multiple Airlines Logo
14:00 - 15:32LGW-BWI
30h 32m1 stop
Multiple Airlines Logo
20:52 - 10:00BWI-LGW
32h 08m1 stop
£396Multiple Airlines
Find Deal
Mon, 29 Sep - Fri, 3 Oct
Icelandair Logo
15:40 - 22:10LGW-IAD
11h 30m1 stop
Icelandair Logo
23:15 - 14:40IAD-LGW
10h 25m1 stop
£397Icelandair
Find Deal
Fri, 3 Oct - Sun, 5 Oct
Icelandair Logo
11:55 - 18:40LGW-BWI
11h 45m1 stop
Icelandair Logo
19:40 - 10:55BWI-LGW
10h 15m1 stop
£398Icelandair
Find Deal
Thu, 8 Jan - Sun, 11 Jan
TAP AIR PORTUGAL Logo
16:00 - 21:00LGW-IAD
34h 00m1 stop
TAP AIR PORTUGAL Logo
22:30 - 09:50IAD-LGW
30h 20m1 stop
£405TAP AIR PORTUGAL
Find Deal
Thu, 4 Dec - Sun, 14 Dec
SWISS Logo
18:40 - 15:30LGW-IAD
25h 50m1 stop
SWISS Logo
17:25 - 17:50IAD-LGW
19h 25m1 stop
£408SWISS
Find Deal
Thu, 6 Nov - Wed, 12 Nov
SWISS Logo
18:40 - 16:15LGW-IAD
26h 35m1 stop
SWISS Logo
20:45 - 17:50IAD-LGW
16h 05m1 stop
£416SWISS
Find Deal
Thu, 2 Oct - Thu, 16 Oct
British Airways Logo
15:05 - 23:07LGW-DCA
13h 02m1 stop
British Airways Logo
06:38 - 08:10DCA-LGW
20h 32m1 stop
£448British Airways
Find Deal
Fri, 3 Oct - Fri, 10 Oct
TAP AIR PORTUGAL Logo
21:25 - 15:15LGW-IAD
22h 50m2 stops
TAP AIR PORTUGAL Logo
17:30 - 09:50IAD-LGW
11h 20m1 stop
£458TAP AIR PORTUGAL
Find Deal
Sun, 23 Nov - Tue, 2 Dec

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

Our best SWISS deals on London Gatwick Airport to Washington, D.C. flight tickets
SWISS
6 Nov
LGW18:40London Gatwick
25h 50m
1 stop
IAD15:30Washington, D.C. Dulles Intl
12 Nov
IAD17:25Washington, D.C. Dulles Intl
19h 25m
1 stop
LGW17:50London Gatwick
£408
Find similar
SWISS
2 Oct
LGW18:40London Gatwick
26h 35m
1 stop
IAD16:15Washington, D.C. Dulles Intl
16 Oct
IAD20:45Washington, D.C. Dulles Intl
16h 05m
1 stop
LGW17:50London Gatwick
£416
Find similar
SWISS
7 Jan
LGW18:40London Gatwick
27h 00m
1 stop
IAD16:40Washington, D.C. Dulles Intl
13 Jan
IAD20:30Washington, D.C. Dulles Intl
16h 20m
1 stop
LGW17:50London Gatwick
£417
Find similar

Icelandair flights from London Gatwick Airport to Washington, D.C.

Our best Icelandair deals on London Gatwick Airport to Washington, D.C. flight tickets
Icelandair
3 Oct
LGW15:40London Gatwick
11h 30m
1 stop
IAD22:10Washington, D.C. Dulles Intl
5 Oct
IAD23:15Washington, D.C. Dulles Intl
10h 25m
1 stop
LGW14:40London Gatwick
£397
Find similar
Icelandair
8 Jan
LGW11:55London Gatwick
11h 45m
1 stop
BWI18:40Baltimore/Washington
11 Jan
BWI19:40Baltimore/Washington
10h 15m
1 stop
LGW10:55London Gatwick
£398
Find similar
Icelandair
26 Sept
LGW15:40London Gatwick
11h 30m
1 stop
IAD22:10Washington, D.C. Dulles Intl
3 Oct
IAD23:15Washington, D.C. Dulles Intl
10h 25m
1 stop
LGW14:40London Gatwick
£400
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London Gatwick Airport to Washington, D.C. 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 16 September 2025.
Use the filters below to find and compare flights from London Gatwick Airport to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Fri 3/10

15:05-23:07

1 stop13h 02m

Washington, D.C. Reagan-National

Sun 5/10

15:35-07:50

1 stop11h 15m

£395

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 23/10

08:55-18:55

1 stop15h 00m

Washington, D.C. Dulles Intl

Mon 27/10

18:05-09:15

1 stop11h 10m

£396

LondonBaltimore

LGW - BWI

LGWBWI

London Gatwick

Mon 29/9

14:00-15:32

1 stop30h 32m

Baltimore/Washington

Fri 3/10

20:52-10:00

1 stop32h 08m

£396

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 3/10

15:40-22:10

1 stop11h 30m

Washington, D.C. Dulles Intl

Sun 5/10

23:15-14:40

1 stop10h 25m

£397

LondonBaltimore

LGW - BWI

LGWBWI

London Gatwick

Thu 8/1

11:55-18:40

1 stop11h 45m

Baltimore/Washington

Sun 11/1

19:40-10:55

1 stop10h 15m

£398

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 4/12

16:00-21:00

1 stop34h 00m

Washington, D.C. Dulles Intl

Sun 14/12

22:30-09:50

1 stop30h 20m

£405

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 6/11

18:40-15:30

1 stop25h 50m

Washington, D.C. Dulles Intl

Wed 12/11

17:25-17:50

1 stop19h 25m

£408

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 2/10

18:40-16:15

1 stop26h 35m

Washington, D.C. Dulles Intl

Thu 16/10

20:45-17:50

1 stop16h 05m

£416

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Fri 3/10

15:05-23:07

1 stop13h 02m

Washington, D.C. Reagan-National

Fri 10/10

06:38-08:10

1 stop20h 32m

£448

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 23/11

21:25-15:15

2 stops22h 50m

Washington, D.C. Dulles Intl

Tue 2/12

17:30-09:50

1 stop11h 20m

£458

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 Washington, D.C. from

How to get the cheapest flight ticket from London Gatwick Airport to Washington, D.C.

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 London Gatwick Airport and Washington, D.C.?

What is the cheapest month to fly to Washington, D.C.?

The cheapest month to fly to Washington, D.C. from London Gatwick Airport is in March. Flight prices, which tend to average around £428, are often lower during this time because this is during the off-season. If you don’t want to visit Washington, D.C. in March, then you should wait until January to fly from London Gatwick Airport, when ticket prices are also cheap, with an average price of £434.

What is the cheapest day to depart on your flight to Washington, D.C.?

On average, the least expensive day to fly to Washington, D.C. from London Gatwick Airport is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as £592. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from London Gatwick Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £666.

What is the cheapest time of day to depart on your flight to Washington, D.C.?

In the evening is the cheapest time of day to fly from London Gatwick Airport to Washington, D.C. when you can find flight prices for as low as £505. Flying to Washington, D.C. in the evening is an ideal time because this is during off-peak travel hours. Flights to Washington, D.C. are more costly in the afternoon, with an average ticket price of £625. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight to Washington, D.C.?

You are more likely to see cheaper flights to Washington, D.C. from London Gatwick Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around £539 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from London Gatwick Airport for as low as £370 on momondo.

Can stopping save me money on London Gatwick Airport to Washington, D.C. flights?

You could potentially save up to 44% on your flight if you consider stops on a London Gatwick Airport to Washington, D.C. flight.

When to book flights from London Gatwick Airport to Washington, D.C.

Are you open to changing your travel dates? Check out the ideal times to fly from London Gatwick Airport to Washington, D.C. according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Gatwick Airport to Washington, D.C. (LGW to WAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Gatwick Airport to Washington, D.C.

Direct flights

None
There are no direct flights from London Gatwick Airport to Washington, D.C.. There are no popular flight routes from London Gatwick Airport to Washington, D.C..
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  • How far is London Gatwick to Washington, D.C. by plane?

    The distance between London Gatwick and Washington, D.C. is about 3667.7 mi. By plane, this route typically takes 11h 25m.

  • When did momondo last update prices for flights from London Gatwick Airport to Washington, D.C.?

    Prices for flights from London Gatwick Airport to Washington, D.C. were last updated today.

  • How many operators does momondo search for flights from London Gatwick Airport to Washington, D.C.?

  • How old do you have to be to fly from London Gatwick Airport to Washington, D.C.?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Gatwick Airport to Washington, D.C..

  • What documentation or ID do you need to fly to Washington, D.C.?

    The travel and health documents you'll need for your trip to Washington, D.C. may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington, D.C.. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from London Gatwick Airport to Washington, D.C.?

Best airlines flying from London Gatwick Airport to Washington, D.C.

Compare and see reviews for airlines that fly from London Gatwick Airport to Washington, D.C. with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom £343Free CancellationRating
7.0
544 reviews
Search Icelandair flights

Travelling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Laurel
College Park
Essex
Alexandria
Fairfax
Bethesda
Oxon Hill
Gettysburg
Cambridge
Ellicott City
Westminster
Arlington
Woodbridge
Owings Mills
Silver Spring
National Harbor

Why use momondo?

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

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 London to Washington, D.C. for you.

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

Yes. All flights to Washington, D.C. from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo helps you find the best flight between London and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from London to Washington, D.C. right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of London to Washington, D.C. flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport