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Cheap flights from Washington, D.C. Dulles Intl Airport to London from $333

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 2/15. 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
8:30 pm - 11:45 am
IAD
-
LGW
10h 15m
1 stop
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
$536Icelandair
Fri, May 1 - Sat, May 9
TAP AIR PORTUGAL Logo
5:30 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
$538TAP AIR PORTUGAL
Mon, Mar 2 - Mon, Mar 9
Icelandair Logo
11:20 pm - 2:40 pm
IAD
-
LGW
10h 20m
1 stop
Icelandair Logo
1:00 pm - 7:20 pm
LGW
-
IAD
11h 20m
1 stop
$539Icelandair
Sun, Jul 19 - Tue, Sep 1
Icelandair Logo
8:30 pm - 11:45 am
IAD
-
LGW
10h 15m
1 stop
Icelandair Logo
3:40 pm - 10:15 pm
LGW
-
IAD
11h 35m
1 stop
$540Icelandair
Sat, May 2 - Fri, May 8
Icelandair Logo
8:30 pm - 2:40 pm
IAD
-
LGW
13h 10m
1 stop
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
$543Icelandair
Tue, Apr 7 - Wed, Apr 15
TAP AIR PORTUGAL Logo
5:30 pm - 8:35 pm
IAD
-
LGW
22h 05m
2 stops
TAP AIR PORTUGAL Logo
4:35 pm - 3:35 pm
LGW
-
IAD
27h 00m
1 stop
$544TAP AIR PORTUGAL
Mon, Mar 2 - Mon, Mar 9
Icelandair Logo
8:30 pm - 2:40 pm
IAD
-
LGW
13h 10m
1 stop
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
$545Icelandair
Tue, Apr 7 - Thu, Apr 23
Icelandair Logo
8:30 pm - 2:40 pm
IAD
-
LGW
13h 10m
1 stop
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
$546Icelandair
Sun, Apr 12 - Sat, Apr 18
Icelandair Logo
8:30 pm - 2:40 pm
IAD
-
LGW
13h 10m
1 stop
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
$547Icelandair
Mon, Apr 13 - Mon, Apr 20
Icelandair Logo
8:30 pm - 2:40 pm
IAD
-
LGW
13h 10m
1 stop
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
$548Icelandair
Tue, Apr 14 - Tue, Apr 21

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
Feb 16
IAD5:30 pmWashington, D.C. Dulles Intl
11h 20m
1 stop
LGW9:50 amLondon Gatwick
Feb 26
LGW4:00 pmLondon Gatwick
34h 00m
1 stop
IAD9:00 pmWashington, D.C. Dulles Intl
$543
TAP AIR PORTUGAL
Mar 2
IAD5:30 pmWashington, D.C. Dulles Intl
22h 05m
2 stops
LGW8:35 pmLondon Gatwick
Mar 9
LGW4:35 pmLondon Gatwick
27h 00m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$544
TAP AIR PORTUGAL
Feb 16
IAD5:30 pmWashington, D.C. Dulles Intl
17h 15m
1 stop
LGW3:45 pmLondon Gatwick
Feb 23
LGW9:25 pmLondon Gatwick
22h 10m
2 stops
IAD2:35 pmWashington, D.C. Dulles Intl
$545

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 1
IAD8:30 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW11:45 amLondon Gatwick
May 9
LGW3:40 pmLondon Gatwick
32h 40m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
$536
Icelandair
Apr 7
IAD8:30 pmWashington, D.C. Dulles Intl
13h 10m
1 stop
LGW2:40 pmLondon Gatwick
Apr 15
LGW3:40 pmLondon Gatwick
32h 40m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
$543
Icelandair
Apr 7
IAD8:30 pmWashington, D.C. Dulles Intl
13h 10m
1 stop
LGW2:40 pmLondon Gatwick
Apr 12
LGW3:40 pmLondon Gatwick
32h 40m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
$545

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 February 10, 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

Fri 5/1

8:30 pm-11:45 am

1 stop10h 15m

London Gatwick

Sat 5/9

3:40 pm-7:20 pm

1 stop32h 40m

$536

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 3/2

5:30 pm-9:50 am

1 stop11h 20m

London Gatwick

Mon 3/9

4:35 pm-3:35 pm

1 stop27h 00m

$538

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 7/19

11:20 pm-2:40 pm

1 stop10h 20m

London Gatwick

Tue 9/1

1:00 pm-7:20 pm

1 stop11h 20m

$539

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sat 5/2

8:30 pm-11:45 am

1 stop10h 15m

London Gatwick

Fri 5/8

3:40 pm-10:15 pm

1 stop11h 35m

$540

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 4/7

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Wed 4/15

3:40 pm-7:20 pm

1 stop32h 40m

$543

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 3/2

5:30 pm-8:35 pm

2 stops22h 05m

London Gatwick

Mon 3/9

4:35 pm-3:35 pm

1 stop27h 00m

$544

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 4/7

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Thu 4/23

3:40 pm-7:20 pm

1 stop32h 40m

$545

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 4/12

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Sat 4/18

3:40 pm-7:20 pm

1 stop32h 40m

$546

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

Mon 4/20

3:40 pm-7:20 pm

1 stop32h 40m

$547

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 4/14

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Tue 4/21

3:40 pm-7:20 pm

1 stop32h 40m

$548

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 February 2026, prices for Washington, D.C. Dulles Intl Airport to London Gatwick Airport flights are approximately 29% cheaper 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 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.
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 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 $505Free CancellationRating
7.1
609 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
Luton
Dover
Slough
Crawley
Hayes
Wembley
Dartford
Croydon
Brentwood
Guildford
Harrow
Watford
Cobham
Folkestone
Romford
Stansted
Richmond

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.

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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