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Cheap flights from Washington, D.C. Dulles Intl Airport to London from $389

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 7/20. 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
11:20 pm - 2:40 pm
IAD
-
LGW
10h 20m
1 stop
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
$755Icelandair
Fri, Sep 11 - Sun, Sep 20
Icelandair Logo
11:20 pm - 2:40 pm
IAD
-
LGW
10h 20m
1 stop
Icelandair Logo
3:40 pm - 10:15 pm
LGW
-
IAD
11h 35m
1 stop
$756Icelandair
Fri, Oct 9 - Sun, Oct 18
Icelandair Logo
8:30 pm - 2:40 pm
IAD
-
LGW
13h 10m
1 stop
Icelandair Logo
3:40 pm - 10:15 pm
LGW
-
IAD
11h 35m
1 stop
$757Icelandair
Sun, Sep 6 - Sat, Sep 12
Icelandair Logo
8:30 pm - 2:40 pm
IAD
-
LGW
13h 10m
1 stop
Icelandair Logo
11:55 am - 6:30 pm
LGW
-
IAD
11h 35m
1 stop
$758Icelandair
Wed, Oct 21 - Wed, Nov 4
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
$759Icelandair
Sun, Sep 6 - Wed, Sep 16
Icelandair Logo
8:30 pm - 2:40 pm
IAD
-
LGW
13h 10m
1 stop
Icelandair Logo
3:40 pm - 10:15 pm
LGW
-
IAD
11h 35m
1 stop
$761Icelandair
Thu, Aug 27 - Sat, Sep 5
Icelandair Logo
11:20 pm - 2:40 pm
IAD
-
LGW
10h 20m
1 stop
Icelandair Logo
3:40 pm - 10:15 pm
LGW
-
IAD
11h 35m
1 stop
$763Icelandair
Fri, Oct 2 - Wed, Oct 7
Icelandair Logo
8:30 pm - 2:40 pm
IAD
-
LGW
13h 10m
1 stop
Icelandair Logo
3:40 pm - 10:15 pm
LGW
-
IAD
11h 35m
1 stop
$764Icelandair
Tue, Oct 6 - Sun, Oct 11
Icelandair Logo
8:40 pm - 10:55 am
IAD
-
LGW
10h 15m
1 stop
Icelandair Logo
11:55 am - 6:30 pm
LGW
-
IAD
11h 35m
1 stop
$765Icelandair
Mon, Oct 26 - Thu, Nov 5
Icelandair Logo
8:40 pm - 10:55 am
IAD
-
LGW
10h 15m
1 stop
Icelandair Logo
11:55 am - 6:30 pm
LGW
-
IAD
11h 35m
1 stop
$766Icelandair
Tue, Oct 27 - Mon, Nov 9

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 11
IAD8:30 pmWashington, D.C. Dulles Intl
13h 10m
1 stop
LGW2:40 pmLondon Gatwick
May 27
LGW3:40 pmLondon Gatwick
11h 35m
1 stop
IAD10:15 pmWashington, D.C. Dulles Intl
$758
Icelandair
May 10
IAD11:20 pmWashington, D.C. Dulles Intl
10h 20m
1 stop
LGW2:40 pmLondon Gatwick
Jun 17
LGW3:40 pmLondon Gatwick
11h 35m
1 stop
IAD10:15 pmWashington, D.C. Dulles Intl
$771
Icelandair
Jul 13
IAD8:30 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW11:45 amLondon Gatwick
Aug 26
LGW3:40 pmLondon Gatwick
32h 40m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
$772

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 May 6, 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

Cheapest round-trip

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 9/11

11:20 pm-2:40 pm

1 stop10h 20m

London Gatwick

Sun 9/20

3:40 pm-7:20 pm

1 stop32h 40m

$755

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 10/9

11:20 pm-2:40 pm

1 stop10h 20m

London Gatwick

Sun 10/18

3:40 pm-10:15 pm

1 stop11h 35m

$756

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 9/6

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Sat 9/12

3:40 pm-10:15 pm

1 stop11h 35m

$757

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 10/21

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Wed 11/4

11:55 am-6:30 pm

1 stop11h 35m

$758

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 9/6

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Wed 9/16

3:40 pm-7:20 pm

1 stop32h 40m

$759

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 8/27

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Sat 9/5

3:40 pm-10:15 pm

1 stop11h 35m

$761

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 10/2

11:20 pm-2:40 pm

1 stop10h 20m

London Gatwick

Wed 10/7

3:40 pm-10:15 pm

1 stop11h 35m

$763

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 10/6

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Sun 10/11

3:40 pm-10:15 pm

1 stop11h 35m

$764
Quickest round-trip

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 10/26

8:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Thu 11/5

11:55 am-6:30 pm

1 stop11h 35m

$765

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 10/27

8:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Mon 11/9

11:55 am-6:30 pm

1 stop11h 35m

$766

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, February 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 $426. If you are unable to visit London Gatwick Airport during the month of February, then departing from Washington, D.C. Dulles Intl Airport during the month November is also very affordable. Most momondo users find prices during this month for around $447.

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

Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to London Gatwick Airport

  • 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 $309Free CancellationRating
7.2
2,239 reviews
Search TAP AIR PORTUGAL flights
IcelandairPriceFrom $505Free CancellationRating
7.0
650 reviews
Search Icelandair flights

Traveling to a place near London?

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

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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