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Cheap flights from Washington, D.C. Dulles Intl Airport to London from $308

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 12/5. 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.
TAP AIR PORTUGAL Logo
5:30 pm - 3:45 pmIAD-LGW
17h 15m1 stop
TAP AIR PORTUGAL Logo
10:40 am - 9:00 pmLGW-IAD
15h 20m1 stop
$584TAP AIR PORTUGAL
Find Deal
Mon, Jan 19 - Fri, Jan 30
Icelandair Logo
7:40 pm - 10:55 amIAD-LGW
10h 15m1 stop
Icelandair Logo
11:55 am - 6:30 pmLGW-IAD
11h 35m1 stop
$586Icelandair
Find Deal
Tue, Dec 30 - Tue, Jan 13
Multiple Airlines Logo
7:40 pm - 12:20 pmIAD-LGW
35h 40m3 stops
Multiple Airlines Logo
1:00 pm - 6:30 pmLGW-IAD
34h 30m3 stops
$587Multiple Airlines
Find Deal
Sun, Jan 11 - Wed, Jan 14
Multiple Airlines Logo
12:23 pm - 10:35 amIAD-LGW
17h 12m2 stops
Multiple Airlines Logo
7:05 am - 5:15 pmLGW-IAD
15h 10m1 stop
$588Multiple Airlines
Find Deal
Thu, Feb 19 - Mon, Feb 23
SWISS Logo
6:10 pm - 5:50 pmIAD-LGW
18h 40m2 stops
SWISS Logo
6:40 pm - 3:30 pmLGW-IAD
25h 50m1 stop
$589SWISS
Find Deal
Thu, Jan 8 - Thu, Jan 15
Icelandair Logo
7:40 pm - 10:55 amIAD-LGW
10h 15m1 stop
Icelandair Logo
11:55 am - 6:30 pmLGW-IAD
11h 35m1 stop
$590Icelandair
Find Deal
Tue, Dec 2 - Tue, Dec 9
Icelandair Logo
7:40 pm - 10:55 amIAD-LGW
10h 15m1 stop
Icelandair Logo
11:55 am - 6:30 pmLGW-IAD
11h 35m1 stop
$592Icelandair
Find Deal
Tue, Dec 2 - Thu, Dec 11
Multiple Airlines Logo
10:30 pm - 11:45 amIAD-LGW
32h 15m2 stops
Multiple Airlines Logo
2:00 pm - 8:38 amLGW-IAD
23h 38m1 stop
$593Multiple Airlines
Find Deal
Fri, Jan 9 - Fri, Jan 16
Icelandair Logo
7:40 pm - 10:55 amIAD-LGW
10h 15m1 stop
Icelandair Logo
11:55 am - 6:30 pmLGW-IAD
11h 35m1 stop
$594Icelandair
Find Deal
Mon, Dec 1 - Tue, Dec 9
Icelandair Logo
7:40 pm - 10:55 amIAD-LGW
10h 15m1 stop
Icelandair Logo
11:55 am - 6:30 pmLGW-IAD
11h 35m1 stop
$595Icelandair
Find Deal
Thu, Jan 15 - Sat, Jan 24

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
Dec 30
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
Jan 13
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
$586
Find similar
Icelandair
Dec 2
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
Dec 9
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
$590
Find similar
Icelandair
Dec 2
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
Dec 11
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
$592
Find similar

SWISS flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport

Our best SWISS deals on Washington, D.C. Dulles Intl Airport to London Gatwick Airport flight tickets
SWISS
Jan 8
IAD6:10 pmWashington, D.C. Dulles Intl
18h 40m
2 stops
LGW5:50 pmLondon Gatwick
Jan 15
LGW6:40 pmLondon Gatwick
25h 50m
1 stop
IAD3:30 pmWashington, D.C. Dulles Intl
$589
Find similar
SWISS
Jan 8
IAD6:10 pmWashington, D.C. Dulles Intl
18h 40m
2 stops
LGW5:50 pmLondon Gatwick
Jan 15
LGW6:40 pmLondon Gatwick
25h 50m
1 stop
IAD3:30 pmWashington, D.C. Dulles Intl
$596
Find similar
SWISS
Jan 28
IAD5:25 pmWashington, D.C. Dulles Intl
19h 25m
1 stop
LGW5:50 pmLondon Gatwick
Feb 3
LGW6:40 pmLondon Gatwick
30h 25m
2 stops
IAD8:05 pmWashington, D.C. Dulles Intl
$600
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 November 25, 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

Mon 1/19

5:30 pm-3:45 pm

1 stop17h 15m

London Gatwick

Fri 1/30

10:40 am-9:00 pm

1 stop15h 20m

$584

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 12/30

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Tue 1/13

11:55 am-6:30 pm

1 stop11h 35m

$586

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 1/11

7:40 pm-12:20 pm

3 stops35h 40m

London Gatwick

Wed 1/14

1:00 pm-6:30 pm

3 stops34h 30m

$587

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 2/19

12:23 pm-10:35 am

2 stops17h 12m

London Gatwick

Mon 2/23

7:05 am-5:15 pm

1 stop15h 10m

$588

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 1/8

6:10 pm-5:50 pm

2 stops18h 40m

London Gatwick

Thu 1/15

6:40 pm-3:30 pm

1 stop25h 50m

$589

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 12/2

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Tue 12/9

11:55 am-6:30 pm

1 stop11h 35m

$590

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 12/2

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Thu 12/11

11:55 am-6:30 pm

1 stop11h 35m

$592

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 1/9

10:30 pm-11:45 am

2 stops32h 15m

London Gatwick

Fri 1/16

2:00 pm-8:38 am

1 stop23h 38m

$593

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 12/1

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Tue 12/9

11:55 am-6:30 pm

1 stop11h 35m

$594

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 1/15

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Sat 1/24

11:55 am-6:30 pm

1 stop11h 35m

$595

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 $476. 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

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.
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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
TAP AIR PORTUGALPriceFrom $425Free CancellationRating
7.1
2,074 reviews
Search TAP AIR PORTUGAL flights
IcelandairPriceFrom $500Free CancellationRating
7.0
581 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
Dover
Luton
Slough
Guildford
Hayes
Dartford
Crawley
Brentwood
Chelmsford
Wembley
Folkestone
Romford
Ilford
Cobham
Stansted
Harrow
Watford

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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