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Cheap flights from London Gatwick Airport to Washington, D.C. from $492

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 4/30. 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.
Icelandair Logo
3:40 pm - 10:15 pm
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
11:20 pm - 2:40 pm
IAD
-
LGW
10h 20m
1 stop
$527Icelandair
Wed, Jun 3 - Wed, Jun 10
Icelandair Logo
11:55 am - 7:30 pm
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
8:30 pm - 2:40 pm
IAD
-
LGW
13h 10m
1 stop
$529Icelandair
Wed, Mar 25 - Thu, Apr 2
Icelandair Logo
3:40 pm - 10:15 pm
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
11:20 pm - 2:40 pm
IAD
-
LGW
10h 20m
1 stop
$531Icelandair
Wed, Jun 10 - Sun, Jun 14
Icelandair Logo
1:00 pm - 7:20 pm
LGW
-
IAD
11h 20m
1 stop
Icelandair Logo
8:30 pm - 11:45 am
IAD
-
LGW
10h 15m
1 stop
$537Icelandair
Thu, May 21 - Sat, May 30
Icelandair Logo
3:40 pm - 10:15 pm
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
11:20 pm - 2:40 pm
IAD
-
LGW
10h 20m
1 stop
$539Icelandair
Sun, May 17 - Sun, May 24
Icelandair Logo
3:40 pm - 10:15 pm
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
8:30 pm - 11:45 am
IAD
-
LGW
10h 15m
1 stop
$540Icelandair
Sun, May 17 - Sat, May 23
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
Icelandair Logo
8:30 pm - 2:40 pm
IAD
-
LGW
13h 10m
1 stop
$541Icelandair
Sat, May 16 - Sun, May 24
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
Icelandair Logo
8:30 pm - 11:45 am
IAD
-
LGW
10h 15m
1 stop
$542Icelandair
Sat, May 16 - Sat, May 23
Icelandair Logo
11:55 am - 7:30 pm
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
8:30 pm - 2:40 pm
IAD
-
LGW
13h 10m
1 stop
$551Icelandair
Wed, Mar 25 - Sat, Jul 4
Multiple Airlines Logo
2:00 pm - 7:24 am
LGW
-
IAD
22h 24m
1 stop
Multiple Airlines Logo
8:09 am - 10:05 am
IAD
-
LGW
21h 56m
1 stop
$553Multiple Airlines
Fri, Mar 6 - Sat, Mar 21

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

Our best Icelandair deals on London Gatwick Airport to Washington, D.C. Dulles Intl Airport flight tickets
Icelandair
Apr 8
LGW3:40 pmLondon Gatwick
32h 40m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
Apr 15
IAD8:30 pmWashington, D.C. Dulles Intl
13h 10m
1 stop
LGW2:40 pmLondon Gatwick
$527
Icelandair
Mar 25
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD7:30 pmWashington, D.C. Dulles Intl
Apr 2
IAD8:30 pmWashington, D.C. Dulles Intl
13h 10m
1 stop
LGW2:40 pmLondon Gatwick
$529
Icelandair
Jun 10
LGW3:40 pmLondon Gatwick
11h 35m
1 stop
IAD10:15 pmWashington, D.C. Dulles Intl
Jun 14
IAD11:20 pmWashington, D.C. Dulles Intl
10h 20m
1 stop
LGW2:40 pmLondon Gatwick
$531

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

Our best TAP AIR PORTUGAL deals on London Gatwick Airport to Washington, D.C. Dulles Intl Airport flight tickets
TAP AIR PORTUGAL
Mar 11
LGW10:40 amLondon Gatwick
15h 20m
1 stop
IAD10:00 pmWashington, D.C. Dulles Intl
Mar 16
IAD6:30 pmWashington, D.C. Dulles Intl
11h 20m
1 stop
LGW9:50 amLondon Gatwick
$572
TAP AIR PORTUGAL
Mar 9
LGW4:35 pmLondon Gatwick
27h 00m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Apr 18
IAD10:35 pmWashington, D.C. Dulles Intl
30h 10m
1 stop
LGW9:45 amLondon Gatwick
$586
TAP AIR PORTUGAL
Apr 18
LGW4:30 pmLondon Gatwick
27h 40m
1 stop
IAD3:10 pmWashington, D.C. Dulles Intl
Apr 25
IAD10:35 pmWashington, D.C. Dulles Intl
30h 10m
1 stop
LGW9:45 amLondon Gatwick
$598

momondo Fare Finder

 
Customize your flight search to find flights from London Gatwick Airport to Washington, D.C. Dulles Intl 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 832,500 searches. Data last updated February 22, 2026.
Use the filters below to find and compare flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 6/3

3:40 pm-10:15 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Wed 6/10

11:20 pm-2:40 pm

1 stop10h 20m

$527

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 3/25

11:55 am-7:30 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Thu 4/2

8:30 pm-2:40 pm

1 stop13h 10m

$529

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 6/10

3:40 pm-10:15 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Sun 6/14

11:20 pm-2:40 pm

1 stop10h 20m

$531

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 5/21

1:00 pm-7:20 pm

1 stop11h 20m

Washington, D.C. Dulles Intl

Sat 5/30

8:30 pm-11:45 am

1 stop10h 15m

$537

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 5/17

3:40 pm-10:15 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Sun 5/24

11:20 pm-2:40 pm

1 stop10h 20m

$539

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 5/17

3:40 pm-10:15 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Sat 5/23

8:30 pm-11:45 am

1 stop10h 15m

$540

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 5/16

3:40 pm-7:20 pm

1 stop32h 40m

Washington, D.C. Dulles Intl

Sun 5/24

8:30 pm-2:40 pm

1 stop13h 10m

$541

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 5/16

3:40 pm-7:20 pm

1 stop32h 40m

Washington, D.C. Dulles Intl

Sat 5/23

8:30 pm-11:45 am

1 stop10h 15m

$542

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 3/25

11:55 am-7:30 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Sat 7/4

8:30 pm-2:40 pm

1 stop13h 10m

$551

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 3/6

2:00 pm-7:24 am

1 stop22h 24m

Washington, D.C. Dulles Intl

Sat 3/21

8:09 am-10:05 am

1 stop21h 56m

$553

Flights are sorted by cheapest round-trip 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. Dulles Intl 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 London Gatwick Airport and Washington, D.C. Dulles Intl Airport?

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

Our data shows that Thursday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $750. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from London Gatwick Airport to Washington, D.C. Dulles Intl Airport for around $896.

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

Flying to Washington, D.C. Dulles Intl Airport from London Gatwick Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $815 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $844 on average. Flights to Washington, D.C. Dulles Intl Airport from London Gatwick Airport at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

Are you open to changing your travel dates? Check out the ideal times to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport (LGW to IAD) flight deals and tips

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

Fastest flight time

11h 35m

Direct flights

None
The fastest flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport takes 11h 35m
There are no direct flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from London Gatwick Airport to Washington, D.C. Dulles Intl Airport.
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  • How far is London Gatwick to Washington, D.C. Dulles Intl by plane?

    The distance between London Gatwick and Washington, D.C. Dulles Intl is about 3682.8 mi. A reasonable flight in good conditions will take 11h 35m.

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

    Prices for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport are updated daily.

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

    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. Dulles Intl Airport.

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

    The travel and health documents required for your trip to Washington, D.C. Dulles Intl 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 Washington, D.C. Dulles Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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
Winchester
Waldorf
Woodbridge
Colonial Beach
Laurel
Towson
Silver Spring
Gaithersburg
Tysons
Fredericksburg
Rockville
Manassas
Springfield
Fairfax
Bethesda
Sterling

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?

Yes. momondo allows you to filter the results for London to Washington, D.C. flights to just show those with flexible booking policies.

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?

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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