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Cheap flights from London Gatwick Airport to Washington, D.C. from $574

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 4/23. 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
10:40 am - 9:00 pm
LGW
-
IAD
15h 20m1 stop
TAP AIR PORTUGAL Logo
11:30 pm - 3:05 pm
IAD
-
LGW
11h 35m1 stop
$610TAP AIR PORTUGAL
mié., mar. 4 - mié., mar. 11
American Airlines Logo
11:20 am - 11:12 pm
LGW
-
IAD
16h 52m2 stops
American Airlines Logo
1:08 pm - 9:00 am
IAD
-
LGW
14h 52m2 stops
$611American Airlines
mié., ene. 14 - mié., ene. 21
SWISS Logo
9:25 am - 4:45 pm
LGW
-
IAD
12h 20m1 stop
SWISS Logo
8:20 pm - 5:50 pm
IAD
-
LGW
16h 30m1 stop
$618SWISS
vie., may. 1 - dom., may. 31
SWISS Logo
6:40 pm - 2:35 pm
LGW
-
IAD
24h 55m2 stops
SWISS Logo
8:30 pm - 5:50 pm
IAD
-
LGW
16h 20m1 stop
$619SWISS
mié., feb. 18 - sáb., feb. 28
TAP AIR PORTUGAL Logo
10:40 am - 9:00 pm
LGW
-
IAD
15h 20m1 stop
TAP AIR PORTUGAL Logo
10:30 pm - 8:35 pm
IAD
-
LGW
17h 05m2 stops
$622TAP AIR PORTUGAL
dom., feb. 8 - dom., feb. 15
Multiple Airlines Logo
8:35 am - 9:00 pm
LGW
-
IAD
17h 25m2 stops
Multiple Airlines Logo
8:09 am - 10:00 am
IAD
-
LGW
21h 51m1 stop
$624Multiple Airlines
mié., mar. 4 - lun., mar. 16
SWISS Logo
9:15 am - 4:45 pm
LGW
-
IAD
12h 30m1 stop
SWISS Logo
8:20 pm - 7:55 am
IAD
-
LGW
30h 35m1 stop
$628SWISS
lun., may. 25 - dom., may. 31
TAP AIR PORTUGAL Logo
10:40 am - 9:00 pm
LGW
-
IAD
15h 20m1 stop
TAP AIR PORTUGAL Logo
10:30 pm - 3:05 pm
IAD
-
LGW
11h 35m1 stop
$629TAP AIR PORTUGAL
dom., feb. 15 - mié., feb. 18
TAP AIR PORTUGAL Logo
4:35 pm - 2:35 pm
LGW
-
IAD
27h 00m1 stop
TAP AIR PORTUGAL Logo
11:30 pm - 8:35 pm
IAD
-
LGW
17h 05m2 stops
$632TAP AIR PORTUGAL
lun., mar. 2 - dom., mar. 8
Multiple Airlines Logo
1:00 pm - 7:51 am
LGW
-
IAD
23h 51m2 stops
Multiple Airlines Logo
1:31 pm - 10:00 am
IAD
-
LGW
15h 29m1 stop
$633Multiple Airlines
dom., ene. 18 - lun., ene. 26

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

Our best American Airlines deals on London Gatwick Airport to Washington, D.C. Dulles Intl Airport flight tickets
American Airlines
Jan 14
LGW11:20 amLondon Gatwick
16h 52m
2 stops
IAD11:12 pmWashington, D.C. Dulles Intl
Jan 21
IAD1:08 pmWashington, D.C. Dulles Intl
14h 52m
2 stops
LGW9:00 amLondon Gatwick
$611
Find similar
American Airlines
Feb 18
LGW11:20 amLondon Gatwick
26h 23m
2 stops
IAD8:43 amWashington, D.C. Dulles Intl
Feb 28
IAD9:11 amWashington, D.C. Dulles Intl
18h 49m
2 stops
LGW9:00 amLondon Gatwick
$704
Find similar

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 4
LGW10:40 amLondon Gatwick
15h 20m
1 stop
IAD9:00 pmWashington, D.C. Dulles Intl
Mar 11
IAD11:30 pmWashington, D.C. Dulles Intl
11h 35m
1 stop
LGW3:05 pmLondon Gatwick
$610
Find similar
TAP AIR PORTUGAL
Feb 8
LGW10:40 amLondon Gatwick
15h 20m
1 stop
IAD9:00 pmWashington, D.C. Dulles Intl
Feb 15
IAD10:30 pmWashington, D.C. Dulles Intl
17h 05m
2 stops
LGW8:35 pmLondon Gatwick
$622
Find similar
TAP AIR PORTUGAL
Feb 15
LGW10:40 amLondon Gatwick
15h 20m
1 stop
IAD9:00 pmWashington, D.C. Dulles Intl
Feb 18
IAD10:30 pmWashington, D.C. Dulles Intl
11h 35m
1 stop
LGW3:05 pmLondon Gatwick
$629
Find similar

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 diciembre 26, 2025.
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

mié. 3/4

10:40 am-9:00 pm

1 stop15h 20m

Washington, D.C. Dulles Intl

mié. 3/11

11:30 pm-3:05 pm

1 stop11h 35m

$610

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

mié. 1/14

11:20 am-11:12 pm

2 stops16h 52m

Washington, D.C. Dulles Intl

mié. 1/21

1:08 pm-9:00 am

2 stops14h 52m

$611

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

vie. 5/1

9:25 am-4:45 pm

1 stop12h 20m

Washington, D.C. Dulles Intl

dom. 5/31

8:20 pm-5:50 pm

1 stop16h 30m

$618

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

mié. 2/18

6:40 pm-2:35 pm

2 stops24h 55m

Washington, D.C. Dulles Intl

sáb. 2/28

8:30 pm-5:50 pm

1 stop16h 20m

$619

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

dom. 2/8

10:40 am-9:00 pm

1 stop15h 20m

Washington, D.C. Dulles Intl

dom. 2/15

10:30 pm-8:35 pm

2 stops17h 05m

$622

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

mié. 3/4

8:35 am-9:00 pm

2 stops17h 25m

Washington, D.C. Dulles Intl

lun. 3/16

8:09 am-10:00 am

1 stop21h 51m

$624

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

lun. 5/25

9:15 am-4:45 pm

1 stop12h 30m

Washington, D.C. Dulles Intl

dom. 5/31

8:20 pm-7:55 am

1 stop30h 35m

$628

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

dom. 2/15

10:40 am-9:00 pm

1 stop15h 20m

Washington, D.C. Dulles Intl

mié. 2/18

10:30 pm-3:05 pm

1 stop11h 35m

$629

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

lun. 3/2

4:35 pm-2:35 pm

1 stop27h 00m

Washington, D.C. Dulles Intl

dom. 3/8

11:30 pm-8:35 pm

2 stops17h 05m

$632

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

dom. 1/18

1:00 pm-7:51 am

2 stops23h 51m

Washington, D.C. Dulles Intl

lun. 1/26

1:31 pm-10:00 am

1 stop15h 29m

$633

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

In general, November 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 $522. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of November, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $529.

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 $751. When flying out on a Monday, 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 $914.

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 evening is the least expensive time of day to depart. momondo users have found prices as low as $743 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $852 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 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

  • 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
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Rockville
Harpers Ferry
Gaithersburg
Reston
Manassas
Sterling
Fairfax

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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