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Cheap flights from Washington, D.C. Dulles Intl Airport to London from $344

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 3/8. 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
$523Icelandair
Tue, Feb 3 - Sat, Feb 21
TAP AIR PORTUGAL Logo
5:30 pm - 8:40 pm
IAD
-
LGW
22h 10m
2 stops
TAP AIR PORTUGAL Logo
10:40 am - 9:00 pm
LGW
-
IAD
15h 20m
1 stop
$524TAP AIR PORTUGAL
Thu, Feb 5 - Sun, Feb 8
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
$525Icelandair
Mon, Feb 2 - Wed, Feb 11
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
$526Icelandair
Sun, Apr 26 - Sat, May 9
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
$527Icelandair
Sun, Feb 1 - Tue, Feb 10
Multiple Airlines Logo
1:31 pm - 10:00 am
IAD
-
LGW
15h 29m
1 stop
Multiple Airlines Logo
2:00 pm - 2:18 pm
LGW
-
IAD
29h 18m
2 stops
$528Multiple Airlines
Mon, Feb 2 - Thu, Feb 5
TAP AIR PORTUGAL Logo
5:30 pm - 9:50 am
IAD
-
LGW
11h 20m
1 stop
TAP AIR PORTUGAL Logo
9:20 pm - 9:00 pm
LGW
-
IAD
28h 40m
2 stops
$529TAP AIR PORTUGAL
Tue, Feb 24 - Tue, Mar 3
TAP AIR PORTUGAL Logo
5:30 pm - 3:45 pm
IAD
-
LGW
17h 15m
1 stop
TAP AIR PORTUGAL Logo
9:25 pm - 3:35 pm
LGW
-
IAD
22h 10m
2 stops
$530TAP AIR PORTUGAL
Tue, Mar 3 - Mon, Mar 9
TAP AIR PORTUGAL Logo
5:30 pm - 8:40 pm
IAD
-
LGW
22h 10m
2 stops
TAP AIR PORTUGAL Logo
10:40 am - 3:15 pm
LGW
-
IAD
33h 35m
1 stop
$531TAP AIR PORTUGAL
Thu, Feb 5 - Sun, Feb 8
TAP AIR PORTUGAL Logo
10:30 pm - 3:45 pm
IAD
-
LGW
12h 15m
1 stop
TAP AIR PORTUGAL Logo
10:10 am - 9:00 pm
LGW
-
IAD
39h 50m
2 stops
$533TAP AIR PORTUGAL
Fri, Jan 30 - Sat, Feb 7

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
Feb 3
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
Feb 21
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
$523
Icelandair
Feb 2
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
Feb 11
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
$525
Icelandair
Apr 26
IAD8:30 pmWashington, D.C. Dulles Intl
13h 10m
1 stop
LGW2:40 pmLondon Gatwick
May 9
LGW1:00 pmLondon Gatwick
11h 20m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
$526

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 5
IAD5:30 pmWashington, D.C. Dulles Intl
22h 10m
2 stops
LGW8:40 pmLondon Gatwick
Feb 8
LGW10:40 amLondon Gatwick
15h 20m
1 stop
IAD9:00 pmWashington, D.C. Dulles Intl
$524
TAP AIR PORTUGAL
Jan 30
IAD10:30 pmWashington, D.C. Dulles Intl
12h 15m
1 stop
LGW3:45 pmLondon Gatwick
Feb 6
LGW9:25 pmLondon Gatwick
22h 50m
2 stops
IAD3:15 pmWashington, D.C. Dulles Intl
$526
TAP AIR PORTUGAL
Feb 24
IAD5:30 pmWashington, D.C. Dulles Intl
11h 20m
1 stop
LGW9:50 amLondon Gatwick
Mar 3
LGW9:20 pmLondon Gatwick
28h 40m
2 stops
IAD9:00 pmWashington, D.C. Dulles Intl
$529

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 26, 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

Tue 2/3

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Sat 2/21

11:55 am-6:30 pm

1 stop11h 35m

$523

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 2/5

5:30 pm-8:40 pm

2 stops22h 10m

London Gatwick

Sun 2/8

10:40 am-9:00 pm

1 stop15h 20m

$524

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 2/2

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Wed 2/11

11:55 am-6:30 pm

1 stop11h 35m

$525

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 4/26

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Sat 5/9

1:00 pm-7:20 pm

1 stop11h 20m

$526

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 2/1

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Tue 2/10

11:55 am-6:30 pm

1 stop11h 35m

$527

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 2/2

1:31 pm-10:00 am

1 stop15h 29m

London Gatwick

Thu 2/5

2:00 pm-2:18 pm

2 stops29h 18m

$528

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 2/24

5:30 pm-9:50 am

1 stop11h 20m

London Gatwick

Tue 3/3

9:20 pm-9:00 pm

2 stops28h 40m

$529

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 3/3

5:30 pm-3:45 pm

1 stop17h 15m

London Gatwick

Mon 3/9

9:25 pm-3:35 pm

2 stops22h 10m

$530

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 2/5

5:30 pm-8:40 pm

2 stops22h 10m

London Gatwick

Sun 2/8

10:40 am-3:15 pm

1 stop33h 35m

$531

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 1/30

10:30 pm-3:45 pm

1 stop12h 15m

London Gatwick

Sat 2/7

10:10 am-9:00 pm

2 stops39h 50m

$533

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 67% 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 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 $494Free CancellationRating
7.1
603 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
Guildford
Crawley
Wembley
Dartford
Hayes
Brentwood
Harrow
Watford
Cobham
Folkestone
Romford
Stansted
Croydon
Richmond

Why use momondo?

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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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