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Cheap flights from Washington, D.C. Dulles Intl Airport to London from $248

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 1/10. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
7:40 pm - 10:55 amIAD-LGW
10h 15m1 stop
Icelandair Logo
11:55 am - 6:30 pmLGW-IAD
11h 35m1 stop
$563Icelandair
Find Deal
seg, jan 5 - seg, fev 23
Multiple Airlines Logo
7:40 pm - 8:15 pmIAD-LGW
19h 35m2 stops
Multiple Airlines Logo
6:55 am - 6:30 pmLGW-IAD
16h 35m2 stops
$564Multiple Airlines
Find Deal
sex, dez 5 - ter, dez 9
Icelandair Logo
7:40 pm - 10:55 amIAD-LGW
10h 15m1 stop
Icelandair Logo
11:55 am - 6:30 pmLGW-IAD
11h 35m1 stop
$566Icelandair
Find Deal
dom, dez 14 - seg, jan 12
Multiple Airlines Logo
12:23 pm - 1:25 pmIAD-LGW
20h 02m2 stops
Multiple Airlines Logo
8:45 am - 6:50 pmLGW-IAD
15h 05m1 stop
$567Multiple Airlines
Find Deal
sáb, jan 31 - sáb, fev 7
Icelandair Logo
7:40 pm - 10:55 amIAD-LGW
10h 15m1 stop
Icelandair Logo
11:55 am - 6:30 pmLGW-IAD
11h 35m1 stop
$568Icelandair
Find Deal
qua, nov 26 - qua, dez 3
TAP AIR PORTUGAL Logo
5:30 pm - 9:25 amIAD-LGW
34h 55m2 stops
TAP AIR PORTUGAL Logo
4:35 pm - 9:00 pmLGW-IAD
33h 25m1 stop
$572TAP AIR PORTUGAL
Find Deal
ter, dez 30 - ter, jan 13
TAP AIR PORTUGAL Logo
5:05 pm - 8:25 pmIAD-LGW
22h 20m2 stops
TAP AIR PORTUGAL Logo
10:35 am - 8:35 pmLGW-IAD
15h 00m1 stop
$573TAP AIR PORTUGAL
Find Deal
sex, abr 3 - sex, abr 10
SWISS Logo
8:30 pm - 5:50 pmIAD-LGW
16h 20m1 stop
SWISS Logo
6:40 pm - 4:40 pmLGW-IAD
27h 00m1 stop
$609SWISS
Find Deal
sex, dez 5 - sex, dez 12
American Airlines Logo
9:15 am - 9:00 amIAD-LGW
18h 45m2 stops
American Airlines Logo
11:20 am - 8:44 amLGW-IAD
26h 24m2 stops
$610American Airlines
Find Deal
qui, dez 4 - sex, dez 12
American Airlines Logo
6:24 am - 9:00 amIAD-LGW
21h 36m2 stops
American Airlines Logo
11:20 am - 8:41 amLGW-IAD
26h 21m2 stops
$611American Airlines
Find Deal
dom, nov 16 - ter, nov 25

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

Our best American Airlines deals on Washington, D.C. Dulles Intl Airport to London Gatwick Airport flight tickets
American Airlines
Dec 4
IAD9:15 amWashington, D.C. Dulles Intl
18h 45m
2 stops
LGW9:00 amLondon Gatwick
Dec 12
LGW11:20 amLondon Gatwick
26h 24m
2 stops
IAD8:44 amWashington, D.C. Dulles Intl
$610
Find similar
American Airlines
Nov 16
IAD6:24 amWashington, D.C. Dulles Intl
21h 36m
2 stops
LGW9:00 amLondon Gatwick
Nov 25
LGW11:20 amLondon Gatwick
26h 21m
2 stops
IAD8:41 amWashington, D.C. Dulles Intl
$611
Find similar

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
Jan 5
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
Feb 23
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
$563
Find similar
Icelandair
Nov 12
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
Nov 24
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
$565
Find similar
Icelandair
Dec 14
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
Jan 12
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
$566
Find similar

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 novembro 4, 2025.
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

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

seg 1/5

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

seg 2/23

11:55 am-6:30 pm

1 stop11h 35m

$563

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

sex 12/5

7:40 pm-8:15 pm

2 stops19h 35m

London Gatwick

ter 12/9

6:55 am-6:30 pm

2 stops16h 35m

$564

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

dom 12/14

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

seg 1/12

11:55 am-6:30 pm

1 stop11h 35m

$566

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

sáb 1/31

12:23 pm-1:25 pm

2 stops20h 02m

London Gatwick

sáb 2/7

8:45 am-6:50 pm

1 stop15h 05m

$567

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

qua 11/26

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

qua 12/3

11:55 am-6:30 pm

1 stop11h 35m

$568

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

ter 12/30

5:30 pm-9:25 am

2 stops34h 55m

London Gatwick

ter 1/13

4:35 pm-9:00 pm

1 stop33h 25m

$572

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

sex 4/3

5:05 pm-8:25 pm

2 stops22h 20m

London Gatwick

sex 4/10

10:35 am-8:35 pm

1 stop15h 00m

$573

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

sex 12/5

8:30 pm-5:50 pm

1 stop16h 20m

London Gatwick

sex 12/12

6:40 pm-4:40 pm

1 stop27h 00m

$609

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

qui 12/4

9:15 am-9:00 am

2 stops18h 45m

London Gatwick

sex 12/12

11:20 am-8:44 am

2 stops26h 24m

$610

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

dom 11/16

6:24 am-9:00 am

2 stops21h 36m

London Gatwick

ter 11/25

11:20 am-8:41 am

2 stops26h 21m

$611

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 London from

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, November 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 $493. If you are unable to visit London Gatwick Airport during the month of November, then departing from Washington, D.C. Dulles Intl Airport during the month August is also very affordable. Most momondo users find prices during this month for around $546.

What is the cheapest day to depart on your flight to London Gatwick Airport?

The cheapest day to depart from Washington, D.C. Dulles Intl Airport to London Gatwick Airport is on a Wednesday when prices can be found for as low as $674. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Gatwick Airport on Saturday is $885.

What is the cheapest time of day to depart on your flight to London Gatwick Airport?

Flying to London Gatwick Airport from Washington, D.C. Dulles Intl Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $694 when looking at flights departing in the evening. At noon is when there is more demand to fly to London Gatwick Airport, so prices are often more expensive at around $819 per ticket.

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

Direct flights

None
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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  • 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 $425Free CancellationRating
7.1
2,046 reviews
Search TAP AIR PORTUGAL flights
IcelandairPriceFrom $500Free CancellationRating
7.1
571 reviews
Search Icelandair flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Milton Keynes
Dover
Luton
Slough
Guildford
Hayes
Dartford
Crawley
Brentwood
Chelmsford
Folkestone
Romford
Ilford
Cobham
Wembley
Stansted
Watford
Harrow

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington, D.C. to London. Millions of users trust and use momondo every year so you are in good hands.

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.

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

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 Washington, D.C. to London.

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

Yes. momondo can track prices for Washington, D.C. to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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