Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Washington, D.C. Dulles Intl Airport to London from $370

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 2/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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 15m1 stop
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m1 stop
$572Icelandair
Fri, Jan 23 - Fri, May 15
TAP AIR PORTUGAL Logo
5:30 pm - 9:50 am
IAD
-
LGW
11h 20m1 stop
TAP AIR PORTUGAL Logo
9:25 pm - 9:00 pm
LGW
-
IAD
52h 35m2 stops
$573TAP AIR PORTUGAL
Thu, Jan 22 - Mon, Jan 26
TAP AIR PORTUGAL Logo
5:30 pm - 9:50 am
IAD
-
LGW
11h 20m1 stop
TAP AIR PORTUGAL Logo
11:00 am - 2:35 pm
LGW
-
IAD
32h 35m2 stops
$574TAP AIR PORTUGAL
Mon, Jan 26 - Mon, Feb 2
TAP AIR PORTUGAL Logo
5:30 pm - 9:50 am
IAD
-
LGW
11h 20m1 stop
TAP AIR PORTUGAL Logo
10:40 am - 3:15 pm
LGW
-
IAD
33h 35m1 stop
$575TAP AIR PORTUGAL
Sat, Jan 31 - Sun, Feb 8
TAP AIR PORTUGAL Logo
5:30 pm - 9:50 am
IAD
-
LGW
11h 20m1 stop
TAP AIR PORTUGAL Logo
10:10 am - 9:00 pm
LGW
-
IAD
39h 50m2 stops
$577TAP AIR PORTUGAL
Thu, Jan 22 - Thu, Jan 29
Icelandair Logo
7:40 pm - 10:55 am
IAD
-
LGW
10h 15m1 stop
Icelandair Logo
11:55 am - 6:30 pm
LGW
-
IAD
11h 35m1 stop
$578Icelandair
Mon, Jan 5 - Sat, Jan 17
Icelandair Logo
7:40 pm - 10:55 am
IAD
-
LGW
10h 15m1 stop
Icelandair Logo
11:55 am - 6:30 pm
LGW
-
IAD
11h 35m1 stop
$579Icelandair
Wed, Jan 14 - Tue, Jan 20
SWISS Logo
8:30 pm - 5:50 pm
IAD
-
LGW
16h 20m1 stop
SWISS Logo
6:40 pm - 3:10 pm
LGW
-
IAD
25h 30m1 stop
$580SWISS
Sun, Jan 11 - Sun, Jan 18
Icelandair Logo
7:40 pm - 10:55 am
IAD
-
LGW
10h 15m1 stop
Icelandair Logo
11:55 am - 7:30 pm
LGW
-
IAD
11h 35m1 stop
$581Icelandair
Sat, Mar 7 - Sat, Mar 14
TAP AIR PORTUGAL Logo
10:30 pm - 3:05 pm
IAD
-
LGW
11h 35m1 stop
TAP AIR PORTUGAL Logo
9:25 pm - 3:15 pm
LGW
-
IAD
22h 50m2 stops
$583TAP AIR PORTUGAL
Wed, Jan 21 - Sun, Jan 25

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
Jan 23
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
May 15
LGW3:40 pmLondon Gatwick
32h 40m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
$572
Find similar
Icelandair
Jan 5
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
Jan 17
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
$578
Find similar
Icelandair
Jan 14
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
Jan 20
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
$579
Find similar

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
Jan 22
IAD5:30 pmWashington, D.C. Dulles Intl
11h 20m
1 stop
LGW9:50 amLondon Gatwick
Jan 26
LGW9:25 pmLondon Gatwick
52h 35m
2 stops
IAD9:00 pmWashington, D.C. Dulles Intl
$573
Find similar
TAP AIR PORTUGAL
Jan 26
IAD5:30 pmWashington, D.C. Dulles Intl
11h 20m
1 stop
LGW9:50 amLondon Gatwick
Feb 2
LGW11:00 amLondon Gatwick
32h 35m
2 stops
IAD2:35 pmWashington, D.C. Dulles Intl
$574
Find similar
TAP AIR PORTUGAL
Jan 31
IAD5:30 pmWashington, D.C. Dulles Intl
11h 20m
1 stop
LGW9:50 amLondon Gatwick
Feb 8
LGW10:40 amLondon Gatwick
33h 35m
1 stop
IAD3:15 pmWashington, D.C. Dulles Intl
$575
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 December 14, 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

Fri 1/23

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Fri 5/15

3:40 pm-7:20 pm

1 stop32h 40m

$572

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 1/22

5:30 pm-9:50 am

1 stop11h 20m

London Gatwick

Mon 1/26

9:25 pm-9:00 pm

2 stops52h 35m

$573

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 1/26

5:30 pm-9:50 am

1 stop11h 20m

London Gatwick

Mon 2/2

11:00 am-2:35 pm

2 stops32h 35m

$574

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sat 1/31

5:30 pm-9:50 am

1 stop11h 20m

London Gatwick

Sun 2/8

10:40 am-3:15 pm

1 stop33h 35m

$575

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 1/22

5:30 pm-9:50 am

1 stop11h 20m

London Gatwick

Thu 1/29

10:10 am-9:00 pm

2 stops39h 50m

$577

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 1/5

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Sat 1/17

11:55 am-6:30 pm

1 stop11h 35m

$578

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 1/14

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Tue 1/20

11:55 am-6:30 pm

1 stop11h 35m

$579

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 1/11

8:30 pm-5:50 pm

1 stop16h 20m

London Gatwick

Sun 1/18

6:40 pm-3:10 pm

1 stop25h 30m

$580

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sat 3/7

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Sat 3/14

11:55 am-7:30 pm

1 stop11h 35m

$581

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 1/21

10:30 pm-3:05 pm

1 stop11h 35m

London Gatwick

Sun 1/25

9:25 pm-3:15 pm

2 stops22h 50m

$583

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 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, 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.

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.
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
7.0
590 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
Wembley
Watford
Ilford
Cobham
Folkestone
Romford
Richmond
Uxbridge
Stansted

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.

An easier way to manage your London Gatwick Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 1/13
Tue 1/20
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to London

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
Flights to London Heathrow Airportfrom $368
Flights to London City Airportfrom $436
Flights to London Stansted Airportfrom $376
Flights to London Luton Airportfrom $380
Flights to London Southend Airportfrom $542
Flights to Glasgow Intl Airportfrom $388
Flights to Belfast Intl Airportfrom $512
Flights to Belfast City Airportfrom $534