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Cheap flights from London Gatwick Airport to Washington, D.C. from $538

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 6/19. 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.
Multiple Airlines Logo
2:00 pm - 6:32 pm
LGW
-
IAD
33h 32m
1 stop
Multiple Airlines Logo
12:00 pm - 10:00 am
IAD
-
LGW
17h 00m
2 stops
$637Multiple Airlines
Fri, Jun 5 - Mon, Aug 3
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
Icelandair Logo
7:40 pm - 10:55 am
IAD
-
LGW
10h 15m
1 stop
$642Icelandair
Sun, May 31 - Sun, Jan 24
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
Icelandair Logo
7:40 pm - 10:55 am
IAD
-
LGW
10h 15m
1 stop
$644Icelandair
Sun, May 31 - Sun, Jan 24
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
Icelandair Logo
7:40 pm - 10:55 am
IAD
-
LGW
10h 15m
1 stop
$645Icelandair
Sun, May 31 - Sun, Jan 24
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
$649Icelandair
Thu, Jun 4 - Mon, Aug 3
Icelandair Logo
1:00 pm - 7:20 pm
LGW
-
IAD
11h 20m
1 stop
Icelandair Logo
11:20 pm - 2:40 pm
IAD
-
LGW
10h 20m
1 stop
$650Icelandair
Thu, Jun 4 - Sun, Jun 7
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
$658Icelandair
Tue, Jun 2 - Wed, Jul 8
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
Icelandair Logo
11:20 pm - 2:40 pm
IAD
-
LGW
10h 20m
1 stop
$661Icelandair
Thu, Jun 4 - Sun, Jun 7
Multiple Airlines Logo
2:00 pm - 6:42 pm
LGW
-
IAD
33h 42m
1 stop
Multiple Airlines Logo
12:00 pm - 10:00 am
IAD
-
LGW
17h 00m
2 stops
$663Multiple Airlines
Thu, Jun 4 - Fri, Jul 31
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
$666Icelandair
Tue, Jun 2 - Wed, Jul 8

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

Our best SWISS deals on London Gatwick Airport to Washington, D.C. Dulles Intl Airport flight tickets
SWISS
Sep 8
LGW6:35 pmLondon Gatwick
25h 50m
1 stop
IAD3:25 pmWashington, D.C. Dulles Intl
Sep 26
IAD8:20 pmWashington, D.C. Dulles Intl
31h 05m
1 stop
LGW8:25 amLondon Gatwick
$658
SWISS
Sep 11
LGW9:25 amLondon Gatwick
12h 20m
1 stop
IAD4:45 pmWashington, D.C. Dulles Intl
Sep 20
IAD8:20 pmWashington, D.C. Dulles Intl
16h 30m
1 stop
LGW5:50 pmLondon Gatwick
$673
SWISS
Sep 12
LGW9:25 amLondon Gatwick
12h 20m
1 stop
IAD4:45 pmWashington, D.C. Dulles Intl
Sep 20
IAD8:20 pmWashington, D.C. Dulles Intl
31h 05m
1 stop
LGW8:25 amLondon Gatwick
$690

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
Oct 7
LGW3:40 pmLondon Gatwick
11h 35m
1 stop
IAD10:15 pmWashington, D.C. Dulles Intl
Oct 12
IAD8:30 pmWashington, D.C. Dulles Intl
13h 10m
1 stop
LGW2:40 pmLondon Gatwick
$638
Icelandair
Oct 7
LGW3:40 pmLondon Gatwick
11h 35m
1 stop
IAD10:15 pmWashington, D.C. Dulles Intl
Oct 12
IAD8:30 pmWashington, D.C. Dulles Intl
13h 10m
1 stop
LGW2:40 pmLondon Gatwick
$639
Icelandair
Oct 8
LGW3:40 pmLondon Gatwick
32h 40m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
Oct 13
IAD8:30 pmWashington, D.C. Dulles Intl
13h 10m
1 stop
LGW2:40 pmLondon Gatwick
$640

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 May 25, 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

Cheapest round-trip

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 6/5

2:00 pm-6:32 pm

1 stop33h 32m

Washington, D.C. Dulles Intl

Mon 8/3

12:00 pm-10:00 am

2 stops17h 00m

$637

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 5/31

3:40 pm-7:20 pm

1 stop32h 40m

Washington, D.C. Dulles Intl

Sun 1/24

7:40 pm-10:55 am

1 stop10h 15m

$642

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 5/31

3:40 pm-7:20 pm

1 stop32h 40m

Washington, D.C. Dulles Intl

Sun 1/24

7:40 pm-10:55 am

1 stop10h 15m

$644

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 5/31

3:40 pm-7:20 pm

1 stop32h 40m

Washington, D.C. Dulles Intl

Sun 1/24

7:40 pm-10:55 am

1 stop10h 15m

$645
Quickest round-trip

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 6/4

1:00 pm-7:20 pm

1 stop11h 20m

Washington, D.C. Dulles Intl

Mon 8/3

8:30 pm-11:45 am

1 stop10h 15m

$649

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 6/4

1:00 pm-7:20 pm

1 stop11h 20m

Washington, D.C. Dulles Intl

Sun 6/7

11:20 pm-2:40 pm

1 stop10h 20m

$650

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 6/2

3:40 pm-7:20 pm

1 stop32h 40m

Washington, D.C. Dulles Intl

Wed 7/8

8:30 pm-11:45 am

1 stop10h 15m

$658

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 6/4

3:40 pm-7:20 pm

1 stop32h 40m

Washington, D.C. Dulles Intl

Sun 6/7

11:20 pm-2:40 pm

1 stop10h 20m

$661

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 6/4

2:00 pm-6:42 pm

1 stop33h 42m

Washington, D.C. Dulles Intl

Fri 7/31

12:00 pm-10:00 am

2 stops17h 00m

$663

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 6/2

3:40 pm-7:20 pm

1 stop32h 40m

Washington, D.C. Dulles Intl

Wed 7/8

8:30 pm-2:40 pm

1 stop13h 10m

$666

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 month to fly to Washington, D.C. Dulles Intl Airport?

In general, April is the cheapest month to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of April, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $522.

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 Sunday, 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 $856.

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 at noon is the least expensive time of day to depart. momondo users have found prices as low as $785 when looking at flights departing at noon. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $815 on average. Flights to Washington, D.C. Dulles Intl Airport from London Gatwick Airport in the morning 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 20m

Direct flights

None
The fastest flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport takes 11h 20m
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.
Search flight deals

Frequently asked questions about flying from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

  • 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 20m.

  • 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
Laurel
Gaithersburg
Colonial Beach
Fredericksburg
Silver Spring
Towson
Rockville
Sterling
Manassas
Linthicum Heights
Tysons
Springfield
Bethesda

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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