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Cheap flights from London Gatwick Airport to Washington, D.C. from $290

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 1/22. 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 round-trip flights

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
4:35 pm - 3:35 pmLGW-IAD
27h 00m1 stop
TAP AIR PORTUGAL Logo
6:30 pm - 3:45 pmIAD-LGW
17h 15m1 stop
$541TAP AIR PORTUGAL
Find Deal
Mon, Mar 9 - Tue, Mar 17
Multiple Airlines Logo
2:00 pm - 11:38 amLGW-IAD
26h 38m2 stops
Multiple Airlines Logo
3:33 pm - 10:05 amIAD-LGW
13h 32m1 stop
$543Multiple Airlines
Find Deal
Sat, Jan 10 - Sat, Jan 17
TAP AIR PORTUGAL Logo
4:35 pm - 3:35 pmLGW-IAD
27h 00m1 stop
TAP AIR PORTUGAL Logo
6:30 pm - 9:50 amIAD-LGW
11h 20m1 stop
$544TAP AIR PORTUGAL
Find Deal
Mon, Mar 9 - Tue, Mar 17
Multiple Airlines Logo
2:00 pm - 11:38 amLGW-IAD
26h 38m2 stops
Multiple Airlines Logo
3:33 pm - 10:00 amIAD-LGW
13h 27m1 stop
$546Multiple Airlines
Find Deal
Fri, Jan 9 - Mon, Jan 12
Icelandair Logo
11:55 am - 6:30 pmLGW-IAD
11h 35m1 stop
Icelandair Logo
7:40 pm - 10:55 amIAD-LGW
10h 15m1 stop
$605Icelandair
Find Deal
Wed, Nov 12 - Mon, Nov 17
Icelandair Logo
11:55 am - 6:30 pmLGW-IAD
11h 35m1 stop
Icelandair Logo
7:40 pm - 10:55 amIAD-LGW
10h 15m1 stop
$607Icelandair
Find Deal
Thu, Nov 27 - Tue, Dec 16
American Airlines Logo
11:20 am - 11:44 pmLGW-DCA
17h 24m2 stops
American Airlines Logo
10:20 am - 7:30 amDCA-LGW
16h 10m2 stops
$656American Airlines
Find Deal
Sun, Dec 14 - Sun, Dec 21
American Airlines Logo
12:30 pm - 8:36 amLGW-DCA
25h 06m1 stop
American Airlines Logo
1:44 pm - 9:00 amDCA-LGW
14h 16m1 stop
$657American Airlines
Find Deal
Sun, Dec 14 - Sun, Dec 21
British Airways Logo
11:20 am - 8:59 pmLGW-DCA
14h 39m1 stop
British Airways Logo
11:30 am - 7:30 amDCA-LGW
16h 00m1 stop
$677British Airways
Find Deal
Thu, Feb 26 - Tue, Mar 17
British Airways Logo
11:20 am - 9:24 pmLGW-DCA
15h 04m1 stop
British Airways Logo
11:46 am - 7:30 amDCA-LGW
14h 44m1 stop
$706British Airways
Find Deal
Fri, Jan 9 - Mon, Jan 12

TAP AIR PORTUGAL flights from London Gatwick Airport to Washington, D.C.

Our best TAP AIR PORTUGAL deals on London Gatwick Airport to Washington, D.C. flight tickets
TAP AIR PORTUGAL
Mar 9
LGW4:35 pmLondon Gatwick
27h 00m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Mar 17
IAD6:30 pmWashington, D.C. Dulles Intl
17h 15m
1 stop
LGW3:45 pmLondon Gatwick
$541
Find similar
TAP AIR PORTUGAL
Mar 9
LGW4:35 pmLondon Gatwick
27h 00m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Mar 17
IAD6:30 pmWashington, D.C. Dulles Intl
11h 20m
1 stop
LGW9:50 amLondon Gatwick
$544
Find similar
TAP AIR PORTUGAL
Feb 12
LGW4:00 pmLondon Gatwick
34h 00m
1 stop
IAD9:00 pmWashington, D.C. Dulles Intl
Feb 15
IAD10:30 pmWashington, D.C. Dulles Intl
12h 15m
1 stop
LGW3:45 pmLondon Gatwick
$549
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
Nov 12
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
Nov 17
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
$605
Find similar
Icelandair
Nov 27
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
Dec 16
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
$607
Find similar
Icelandair
Nov 25
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
Dec 2
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
$610
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated October 30, 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 - IAD

LGWIAD

London Gatwick

Mon 3/9

4:35 pm-3:35 pm

1 stop27h 00m

Washington, D.C. Dulles Intl

Tue 3/17

6:30 pm-3:45 pm

1 stop17h 15m

$541

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 1/10

2:00 pm-11:38 am

2 stops26h 38m

Washington, D.C. Dulles Intl

Sat 1/17

3:33 pm-10:05 am

1 stop13h 32m

$543

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 3/9

4:35 pm-3:35 pm

1 stop27h 00m

Washington, D.C. Dulles Intl

Tue 3/17

6:30 pm-9:50 am

1 stop11h 20m

$544

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 1/9

2:00 pm-11:38 am

2 stops26h 38m

Washington, D.C. Dulles Intl

Mon 1/12

3:33 pm-10:00 am

1 stop13h 27m

$546

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 11/12

11:55 am-6:30 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Mon 11/17

7:40 pm-10:55 am

1 stop10h 15m

$605

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 11/27

11:55 am-6:30 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Tue 12/16

7:40 pm-10:55 am

1 stop10h 15m

$607

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Sun 12/14

11:20 am-11:44 pm

2 stops17h 24m

Washington, D.C. Reagan-National

Sun 12/21

10:20 am-7:30 am

2 stops16h 10m

$656

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Sun 12/14

12:30 pm-8:36 am

1 stop25h 06m

Washington, D.C. Reagan-National

Sun 12/21

1:44 pm-9:00 am

1 stop14h 16m

$657

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Thu 2/26

11:20 am-8:59 pm

1 stop14h 39m

Washington, D.C. Reagan-National

Tue 3/17

11:30 am-7:30 am

1 stop16h 00m

$677

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Fri 1/9

11:20 am-9:24 pm

1 stop15h 04m

Washington, D.C. Reagan-National

Mon 1/12

11:46 am-7:30 am

1 stop14h 44m

$706

Flights are sorted by cheapest round-trip flights 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 cheapest month to fly to Washington, D.C.?

The month of April is, on average, the cheapest month to fly to Washington, D.C. from London Gatwick Airport, with most prices found around $576. If you’re not able to fly to Washington, D.C. in April, then March is your next best option. Flight prices from London Gatwick Airport to Washington, D.C. during March average around $581.

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 Thursday. momondo users have found tickets for Thursday departures for as low as $781. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from London Gatwick Airport to Washington, D.C. for around $929.

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 $762. Flying to Washington, D.C. in the evening is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the morning because they tend to be around $870. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 round-trip 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?

    London Gatwick and Washington, D.C. are 3667.7 mi apart from one another. In terms of flight time, this usually takes a little over 11h 10m.

  • 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. are refreshed on a daily basis.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify 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 required travel and health documents for your Washington, D.C. trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Rockville
Manassas
Reston
Gaithersburg
Fairfax
Glen Burnie
Springfield
Linthicum Heights

Why use momondo?

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

It is quick and easy to find London to Washington, D.C. flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington, D.C. that suits you.

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

All flight searches from London to Washington, D.C. on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Washington, D.C..

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

Price alerts on flights to Washington, D.C. from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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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