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Cheap flights from Washington, D.C. Dulles Intl Airport to London from $267

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 10/10. 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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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to London

Cheap round-trip flights

Icelandair Logo
11:15 pm - 2:40 pmIAD-LGW
10h 25m1 stop
Icelandair Logo
3:40 pm - 7:20 pmLGW-IAD
32h 40m1 stop
$489Icelandair
Find Deal
Wed, Oct 1 - Tue, Oct 7
Icelandair Logo
11:15 pm - 2:35 pmIAD-LGW
10h 20m1 stop
Icelandair Logo
3:40 pm - 7:20 pmLGW-IAD
32h 40m1 stop
$491Icelandair
Find Deal
Sat, Oct 4 - Tue, Oct 14
Icelandair Logo
8:30 pm - 2:40 pmIAD-LGW
13h 10m1 stop
Icelandair Logo
3:40 pm - 10:10 pmLGW-IAD
11h 30m1 stop
$492Icelandair
Find Deal
Wed, Oct 1 - Wed, Oct 15
Icelandair Logo
8:30 pm - 2:40 pmIAD-LGW
13h 10m1 stop
Icelandair Logo
3:40 pm - 7:20 pmLGW-IAD
32h 40m1 stop
$493Icelandair
Find Deal
Fri, Oct 3 - Tue, Oct 7
Icelandair Logo
11:15 pm - 2:40 pmIAD-LGW
10h 25m1 stop
Icelandair Logo
3:40 pm - 7:20 pmLGW-IAD
32h 40m1 stop
$494Icelandair
Find Deal
Wed, Oct 1 - Tue, Oct 7
Icelandair Logo
8:30 pm - 2:35 pmIAD-LGW
13h 05m1 stop
Icelandair Logo
3:40 pm - 7:20 pmLGW-IAD
32h 40m1 stop
$495Icelandair
Find Deal
Mon, Oct 13 - Thu, Oct 23
Multiple Airlines Logo
7:40 pm - 7:25 pmIAD-LGW
18h 45m2 stops
Multiple Airlines Logo
8:50 am - 6:30 pmLGW-IAD
14h 40m2 stops
$503Multiple Airlines
Find Deal
Mon, Nov 10 - Tue, Nov 18
TAP AIR PORTUGAL Logo
10:30 pm - 3:05 pmIAD-LGW
11h 35m1 stop
TAP AIR PORTUGAL Logo
10:40 am - 9:00 pmLGW-IAD
15h 20m1 stop
$507TAP AIR PORTUGAL
Find Deal
Wed, Jan 7 - Wed, Jan 14
TAP AIR PORTUGAL Logo
5:00 pm - 8:25 pmIAD-LGW
22h 25m2 stops
TAP AIR PORTUGAL Logo
4:25 pm - 3:20 pmLGW-IAD
27h 55m1 stop
$512TAP AIR PORTUGAL
Find Deal
Tue, Oct 14 - Tue, Oct 21
TAP AIR PORTUGAL Logo
10:30 pm - 8:35 pmIAD-LGW
17h 05m2 stops
TAP AIR PORTUGAL Logo
4:35 pm - 3:15 pmLGW-IAD
27h 40m1 stop
$514TAP AIR PORTUGAL
Find Deal
Sun, Nov 30 - Wed, Dec 10

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 1
IAD11:15 pmWashington, D.C. Dulles Intl
10h 25m
1 stop
LGW2:40 pmLondon Gatwick
Oct 7
LGW3:40 pmLondon Gatwick
32h 40m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
$489
Find similar
Icelandair
Oct 4
IAD11:15 pmWashington, D.C. Dulles Intl
10h 20m
1 stop
LGW2:35 pmLondon Gatwick
Oct 14
LGW3:40 pmLondon Gatwick
32h 40m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
$491
Find similar
Icelandair
Oct 1
IAD8:30 pmWashington, D.C. Dulles Intl
13h 10m
1 stop
LGW2:40 pmLondon Gatwick
Oct 15
LGW3:40 pmLondon Gatwick
11h 30m
1 stop
IAD10:10 pmWashington, D.C. Dulles Intl
$492
Find similar

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
Jan 7
IAD10:30 pmWashington, D.C. Dulles Intl
11h 35m
1 stop
LGW3:05 pmLondon Gatwick
Jan 14
LGW10:40 amLondon Gatwick
15h 20m
1 stop
IAD9:00 pmWashington, D.C. Dulles Intl
$507
Find similar
TAP AIR PORTUGAL
Oct 14
IAD5:00 pmWashington, D.C. Dulles Intl
22h 25m
2 stops
LGW8:25 pmLondon Gatwick
Oct 21
LGW4:25 pmLondon Gatwick
27h 55m
1 stop
IAD3:20 pmWashington, D.C. Dulles Intl
$512
Find similar
TAP AIR PORTUGAL
Nov 30
IAD10:30 pmWashington, D.C. Dulles Intl
17h 05m
2 stops
LGW8:35 pmLondon Gatwick
Dec 10
LGW4:35 pmLondon Gatwick
27h 40m
1 stop
IAD3:15 pmWashington, D.C. Dulles Intl
$514
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 September 16, 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

Wed 10/1

11:15 pm-2:40 pm

1 stop10h 25m

London Gatwick

Tue 10/7

3:40 pm-7:20 pm

1 stop32h 40m

$489

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sat 10/4

11:15 pm-2:35 pm

1 stop10h 20m

London Gatwick

Tue 10/14

3:40 pm-7:20 pm

1 stop32h 40m

$491

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 10/1

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Wed 10/15

3:40 pm-10:10 pm

1 stop11h 30m

$492

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 10/3

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Tue 10/7

3:40 pm-7:20 pm

1 stop32h 40m

$493

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 10/1

11:15 pm-2:40 pm

1 stop10h 25m

London Gatwick

Tue 10/7

3:40 pm-7:20 pm

1 stop32h 40m

$494

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 10/13

8:30 pm-2:35 pm

1 stop13h 05m

London Gatwick

Thu 10/23

3:40 pm-7:20 pm

1 stop32h 40m

$495

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 11/10

7:40 pm-7:25 pm

2 stops18h 45m

London Gatwick

Tue 11/18

8:50 am-6:30 pm

2 stops14h 40m

$503

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 1/7

10:30 pm-3:05 pm

1 stop11h 35m

London Gatwick

Wed 1/14

10:40 am-9:00 pm

1 stop15h 20m

$507

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 10/14

5:00 pm-8:25 pm

2 stops22h 25m

London Gatwick

Tue 10/21

4:25 pm-3:20 pm

1 stop27h 55m

$512

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 11/30

10:30 pm-8:35 pm

2 stops17h 05m

London Gatwick

Wed 12/10

4:35 pm-3:15 pm

1 stop27h 40m

$514

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 typical price of a round-trip flight between Washington, D.C. Dulles Intl Airport and London Gatwick Airport?

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 $502. 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
IcelandairPriceFrom $481Free CancellationRating
7.0
544 reviews
Search Icelandair flights

Traveling to a place near London?

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Gatwick
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Dover
Luton
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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.

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.

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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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