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Cheap flights from Washington, D.C. Dulles Intl Airport to London from $366

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 3/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
Icelandair Logo
7:40 pm - 10:55 am
IAD
-
LGW
10h 15m
1 stop
Icelandair Logo
11:55 am - 6:30 pm
LGW
-
IAD
11h 35m
1 stop
$528Icelandair
Sun, Jan 25 - Tue, Feb 3
Multiple Airlines Logo
7:40 pm - 1:05 pm
IAD
-
LGW
12h 25m
2 stops
Multiple Airlines Logo
8:50 am - 6:30 pm
LGW
-
IAD
14h 40m
2 stops
$529Multiple Airlines
Sat, Jan 31 - Wed, Feb 4
Multiple Airlines Logo
5:05 pm - 8:30 am
IAD
-
LGW
10h 25m
1 stop
Multiple Airlines Logo
8:50 am - 3:35 pm
LGW
-
IAD
11h 45m
1 stop
$530Multiple Airlines
Thu, Feb 12 - Tue, Feb 17
TAP AIR PORTUGAL Logo
6:30 pm - 9:50 am
IAD
-
LGW
11h 20m
1 stop
TAP AIR PORTUGAL Logo
4:35 pm - 3:35 pm
LGW
-
IAD
27h 00m
1 stop
$531TAP AIR PORTUGAL
Thu, Mar 19 - Mon, Mar 23
TAP AIR PORTUGAL Logo
5:30 pm - 9:50 am
IAD
-
LGW
11h 20m
1 stop
TAP AIR PORTUGAL Logo
4:35 pm - 2:35 pm
LGW
-
IAD
27h 00m
1 stop
$532TAP AIR PORTUGAL
Mon, Feb 16 - Mon, Feb 23
Multiple Airlines Logo
7:40 pm - 7:25 pm
IAD
-
LGW
18h 45m
2 stops
Multiple Airlines Logo
8:50 am - 6:30 pm
LGW
-
IAD
14h 40m
2 stops
$533Multiple Airlines
Mon, Feb 9 - Wed, Feb 18
Icelandair Logo
8:30 pm - 2:40 pm
IAD
-
LGW
13h 10m
1 stop
Icelandair Logo
1:00 pm - 7:20 pm
LGW
-
IAD
11h 20m
1 stop
$534Icelandair
Mon, Apr 13 - Thu, Apr 30
Multiple Airlines Logo
8:15 am - 10:00 am
IAD
-
LGW
20h 45m
1 stop
Multiple Airlines Logo
2:00 pm - 7:24 am
LGW
-
IAD
22h 24m
1 stop
$535Multiple Airlines
Mon, Mar 2 - Fri, Mar 6
Icelandair Logo
7:40 pm - 10:55 am
IAD
-
LGW
10h 15m
1 stop
Icelandair Logo
11:55 am - 6:30 pm
LGW
-
IAD
11h 35m
1 stop
$536Icelandair
Mon, Feb 16 - Sun, Feb 22
Icelandair Logo
8:40 pm - 10:55 am
IAD
-
LGW
10h 15m
1 stop
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
$537Icelandair
Sat, Mar 21 - Sat, May 30

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
May 14
IAD8:30 pmWashington, D.C. Dulles Intl
13h 10m
1 stop
LGW2:40 pmLondon Gatwick
May 18
LGW3:40 pmLondon Gatwick
32h 40m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
$526
Icelandair
May 2
IAD8:30 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW11:45 amLondon Gatwick
May 7
LGW1:00 pmLondon Gatwick
11h 20m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
$527
Icelandair
Jan 25
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
Feb 3
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
$528

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
Mar 19
IAD6:30 pmWashington, D.C. Dulles Intl
11h 20m
1 stop
LGW9:50 amLondon Gatwick
Mar 23
LGW4:35 pmLondon Gatwick
27h 00m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$531
TAP AIR PORTUGAL
Feb 16
IAD5:30 pmWashington, D.C. Dulles Intl
11h 20m
1 stop
LGW9:50 amLondon Gatwick
Feb 23
LGW4:35 pmLondon Gatwick
27h 00m
1 stop
IAD2:35 pmWashington, D.C. Dulles Intl
$532
TAP AIR PORTUGAL
Mar 19
IAD6:30 pmWashington, D.C. Dulles Intl
11h 20m
1 stop
LGW9:50 amLondon Gatwick
Mar 23
LGW11:00 amLondon Gatwick
32h 35m
2 stops
IAD3:35 pmWashington, D.C. Dulles Intl
$540

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 January 15, 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

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 1/25

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Tue 2/3

11:55 am-6:30 pm

1 stop11h 35m

$528

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sat 1/31

7:40 pm-1:05 pm

2 stops12h 25m

London Gatwick

Wed 2/4

8:50 am-6:30 pm

2 stops14h 40m

$529

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 2/12

5:05 pm-8:30 am

1 stop10h 25m

London Gatwick

Tue 2/17

8:50 am-3:35 pm

1 stop11h 45m

$530

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 3/19

6:30 pm-9:50 am

1 stop11h 20m

London Gatwick

Mon 3/23

4:35 pm-3:35 pm

1 stop27h 00m

$531

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 2/16

5:30 pm-9:50 am

1 stop11h 20m

London Gatwick

Mon 2/23

4:35 pm-2:35 pm

1 stop27h 00m

$532

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 2/9

7:40 pm-7:25 pm

2 stops18h 45m

London Gatwick

Wed 2/18

8:50 am-6:30 pm

2 stops14h 40m

$533

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 4/13

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Thu 4/30

1:00 pm-7:20 pm

1 stop11h 20m

$534

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 3/2

8:15 am-10:00 am

1 stop20h 45m

London Gatwick

Fri 3/6

2:00 pm-7:24 am

1 stop22h 24m

$535

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 2/16

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Sun 2/22

11:55 am-6:30 pm

1 stop11h 35m

$536

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sat 3/21

8:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Sat 5/30

3:40 pm-7:20 pm

1 stop32h 40m

$537

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 $447. 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 September is also very affordable. Most momondo users find prices during this month for around $506.

How have Washington, D.C. Dulles Intl Airport to London Gatwick Airport flight prices changed over time?

As of January 2026, prices for Washington, D.C. Dulles Intl Airport to London Gatwick Airport flights are approximately 66% more expensive when compared to flights at the same time last year.

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 05m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to London Gatwick Airport takes 10h 05m
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.
Search flight deals

  • 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 05m.

  • 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 $505Free CancellationRating
7.1
596 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
Luton
Milton Keynes
Dover
Slough
Guildford
Crawley
Dartford
Hayes
Wembley
Brentwood
Watford
Cobham
Folkestone
Romford
Harrow
Croydon
Richmond
Uxbridge

Why use momondo?

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

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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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