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Cheap flights from Washington, D.C. Dulles Intl Airport to London from $273

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to London departing on 9/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Washington, D.C. Dulles Intl Airport to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
10:35 pm - 3:35 pmIAD  Washington, D.C. Dulles Intl-LGW London Gatwick
12h 00m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
4:25 pm - 3:10 pmLGW  London Gatwick-IAD Washington, D.C. Dulles Intl
27h 45m1 stop Lisbon Humberto Delgado
$619TAP AIR PORTUGAL
Mon, Sep 21 - Tue, Sep 29
TAP AIR PORTUGAL Logo
5:40 pm - 3:35 pmIAD  Washington, D.C. Dulles Intl-LGW London Gatwick
16h 55m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
4:25 pm - 3:10 pmLGW  London Gatwick-IAD Washington, D.C. Dulles Intl
27h 45m1 stop Lisbon Humberto Delgado
$620TAP AIR PORTUGAL
Mon, Sep 21 - Wed, Sep 30
TAP AIR PORTUGAL Logo
10:35 pm - 3:35 pmIAD  Washington, D.C. Dulles Intl-LGW London Gatwick
12h 00m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
10:35 am - 8:35 pmLGW  London Gatwick-IAD Washington, D.C. Dulles Intl
15h 00m1 stop Lisbon Humberto Delgado
$621TAP AIR PORTUGAL
Tue, Oct 6 - Thu, Oct 15
Multiple Airlines Logo
12:00 pm - 10:00 amIAD  Washington, D.C. Dulles Intl-LGW London Gatwick
17h 00m2 stops Blountville Tri Cities TN/VA Orlando
Multiple Airlines Logo
2:00 pm - 10:17 amLGW  London Gatwick-IAD Washington, D.C. Dulles Intl
25h 17m1 stop Orlando
$622Multiple Airlines
Mon, Aug 24 - Fri, Sep 11
TAP AIR PORTUGAL Logo
5:25 pm - 9:50 amIAD  Washington, D.C. Dulles Intl-LGW London Gatwick
11h 25m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
10:40 am - 8:35 pmLGW  London Gatwick-IAD Washington, D.C. Dulles Intl
14h 55m1 stop Lisbon Humberto Delgado
$623TAP AIR PORTUGAL
Sat, Nov 7 - Wed, Nov 18
Multiple Airlines Logo
8:20 pm - 7:15 pmIAD  Washington, D.C. Dulles Intl-LGW London Gatwick
17h 55m2 stops Kastrup Copenhagen Stockholm Arlanda
Multiple Airlines Logo
1:10 pm - 5:00 pmLGW  London Gatwick-IAD Washington, D.C. Dulles Intl
32h 50m2 stops Stockholm Arlanda Kastrup Copenhagen
$624Multiple Airlines
Mon, Sep 21 - Tue, Sep 29
Multiple Airlines Logo
8:00 pm - 10:00 amIAD  Washington, D.C. Dulles Intl-LGW London Gatwick
33h 00m1 stop Orlando
Multiple Airlines Logo
10:10 am - 7:09 pmLGW  London Gatwick-IAD Washington, D.C. Dulles Intl
36h 59m1 stop Orlando
$624Multiple Airlines
Wed, Oct 21 - Wed, Oct 28
Icelandair Logo
8:30 pm - 2:40 pmIAD  Washington, D.C. Dulles Intl-LGW London Gatwick
13h 10m1 stop Reykjavik Keflavik Intl
Icelandair Logo
11:55 am - 7:30 pmLGW  London Gatwick-IAD Washington, D.C. Dulles Intl
11h 35m1 stop Reykjavik Keflavik Intl
$642Icelandair
Fri, Oct 23 - Fri, Oct 30
Icelandair Logo
8:30 pm - 2:40 pmIAD  Washington, D.C. Dulles Intl-LGW London Gatwick
13h 10m1 stop Reykjavik Keflavik Intl
Icelandair Logo
11:55 am - 7:30 pmLGW  London Gatwick-IAD Washington, D.C. Dulles Intl
11h 35m1 stop Reykjavik Keflavik Intl
$642Icelandair
Fri, Oct 23 - Sat, Oct 31
Icelandair Logo
8:40 pm - 10:55 amIAD  Washington, D.C. Dulles Intl-LGW London Gatwick
10h 15m1 stop Reykjavik Keflavik Intl
Icelandair Logo
11:55 am - 7:30 pmLGW  London Gatwick-IAD Washington, D.C. Dulles Intl
11h 35m1 stop Reykjavik Keflavik Intl
$642Icelandair
Mon, Oct 26 - Fri, Oct 30

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

Our best Icelandair deals on Washington, D.C. Dulles Intl Airport to London Gatwick Airport flight tickets
Icelandair
Oct 23
IAD8:30 pmWashington, D.C. Dulles Intl
13h 10m
1 stop
LGW2:40 pmLondon Gatwick
Oct 31
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD7:30 pmWashington, D.C. Dulles Intl
$642
Icelandair
Oct 18
IAD11:20 pmWashington, D.C. Dulles Intl
10h 20m
1 stop
LGW2:40 pmLondon Gatwick
Oct 31
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD7:30 pmWashington, D.C. Dulles Intl
$643
Icelandair
Oct 23
IAD8:30 pmWashington, D.C. Dulles Intl
13h 10m
1 stop
LGW2:40 pmLondon Gatwick
Nov 4
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
$646

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

Our best TAP AIR PORTUGAL deals on Washington, D.C. Dulles Intl Airport to London Gatwick Airport flight tickets
TAP AIR PORTUGAL
Sep 21
IAD10:35 pmWashington, D.C. Dulles Intl
12h 00m
1 stop
LGW3:35 pmLondon Gatwick
Sep 29
LGW4:25 pmLondon Gatwick
27h 45m
1 stop
IAD3:10 pmWashington, D.C. Dulles Intl
$619
TAP AIR PORTUGAL
Sep 21
IAD5:40 pmWashington, D.C. Dulles Intl
16h 55m
1 stop
LGW3:35 pmLondon Gatwick
Sep 30
LGW4:25 pmLondon Gatwick
27h 45m
1 stop
IAD3:10 pmWashington, D.C. Dulles Intl
$620
TAP AIR PORTUGAL
Oct 6
IAD10:35 pmWashington, D.C. Dulles Intl
12h 00m
1 stop
LGW3:35 pmLondon Gatwick
Oct 15
LGW10:35 amLondon Gatwick
15h 00m
1 stop
IAD8:35 pmWashington, D.C. Dulles Intl
$621

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport to London Gatwick 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 August 7, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LGW London Gatwick

IADLGW

Washington, D.C. Dulles Intl

Mon 9/21

10:35 pm-3:35 pm

1 stop12h 00m

London Gatwick

Tue 9/29

4:25 pm-3:10 pm

1 stop27h 45m

$619

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LGW London Gatwick

IADLGW

Washington, D.C. Dulles Intl

Mon 9/21

5:40 pm-3:35 pm

1 stop16h 55m

London Gatwick

Wed 9/30

4:25 pm-3:10 pm

1 stop27h 45m

$620

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LGW London Gatwick

IADLGW

Washington, D.C. Dulles Intl

Tue 10/6

10:35 pm-3:35 pm

1 stop12h 00m

London Gatwick

Thu 10/15

10:35 am-8:35 pm

1 stop15h 00m

$621

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LGW London Gatwick

IADLGW

Washington, D.C. Dulles Intl

Mon 8/24

12:00 pm-10:00 am

2 stops17h 00m

London Gatwick

Fri 9/11

2:00 pm-10:17 am

1 stop25h 17m

$622

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LGW London Gatwick

IADLGW

Washington, D.C. Dulles Intl

Sat 11/7

5:25 pm-9:50 am

1 stop11h 25m

London Gatwick

Wed 11/18

10:40 am-8:35 pm

1 stop14h 55m

$623

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LGW London Gatwick

IADLGW

Washington, D.C. Dulles Intl

Mon 9/21

8:20 pm-7:15 pm

2 stops17h 55m

London Gatwick

Tue 9/29

1:10 pm-5:00 pm

2 stops32h 50m

$624

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LGW London Gatwick

IADLGW

Washington, D.C. Dulles Intl

Wed 10/21

8:00 pm-10:00 am

1 stop33h 00m

London Gatwick

Wed 10/28

10:10 am-7:09 pm

1 stop36h 59m

$624

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LGW London Gatwick

IADLGW

Washington, D.C. Dulles Intl

Fri 10/23

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Fri 10/30

11:55 am-7:30 pm

1 stop11h 35m

$642

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LGW London Gatwick

IADLGW

Washington, D.C. Dulles Intl

Fri 10/23

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Sat 10/31

11:55 am-7:30 pm

1 stop11h 35m

$642
Quickest round-trip

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LGW London Gatwick

IADLGW

Washington, D.C. Dulles Intl

Mon 10/26

8:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Fri 10/30

11:55 am-7:30 pm

1 stop11h 35m

$642

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to London Gatwick 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 London Gatwick Airport?

In general, February is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to London Gatwick Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $426. If you are unable to visit London Gatwick Airport during the month of February, then departing from Washington, D.C. Dulles Intl Airport during the month November is also very affordable. Most momondo users find prices during this month for around $446.

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

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

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

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

Fastest flight time

10h 15m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to London Gatwick Airport takes 10h 15m
There are no direct flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to London Gatwick Airport.
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Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to London Gatwick Airport

  • How far is Washington, D.C. Dulles Intl to London Gatwick by plane?

    The straight-line distance from Washington, D.C. Dulles Intl to London Gatwick is 3682.8 mi. By plane, this route typically takes 10h 15m.

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

    Prices for flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport are refreshed on a daily basis.

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

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

  • What documentation or ID do you need to fly to London Gatwick Airport?

    The travel and health documents you'll need for your trip to London Gatwick Airport 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 London Gatwick Airport. 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 Washington, D.C. Dulles Intl Airport to London Gatwick Airport?

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

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to London Gatwick Airport with momondo
Airline
Rating
Free Cancellation
Price
TAP AIR PORTUGALPriceFrom $309Free CancellationRating
7.2
2,357 reviews
Search TAP AIR PORTUGAL flights
IcelandairPriceFrom $494Free CancellationRating
7.0
721 reviews
Search Icelandair flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Gatwick
Milton Keynes
Luton
Hayes
Wembley
Dover
Croydon
Stansted
Kingston upon Thames
Slough
Harrow
Watford
Cobham
Richmond
Uxbridge
Worthing
Romford
Ilford
Dunstable

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

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

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