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Cheap flights from London Gatwick Airport to Washington, D.C. from £364

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Gatwick Airport to Washington, D.C. departing on 31/5. 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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Cheap return flights

Enter your travel dates to find the best prices.
Icelandair Logo
11:55 - 19:30
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
20:40 - 10:55
IAD
-
LGW
10h 15m
1 stop
£398Icelandair
Mon, 9 Mar - Tue, 17 Mar
Icelandair Logo
11:55 - 18:30
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
20:40 - 10:55
IAD
-
LGW
10h 15m
1 stop
£400Icelandair
Wed, 4 Mar - Wed, 11 Mar
SWISS Logo
18:40 - 16:40
LGW
-
IAD
27h 00m
1 stop
SWISS Logo
17:45 - 17:50
IAD
-
LGW
19h 05m
1 stop
£420SWISS
Fri, 20 Feb - Mon, 2 Mar
Multiple Airlines Logo
08:50 - 18:30
LGW
-
IAD
14h 40m
2 stops
Multiple Airlines Logo
19:40 - 17:20
IAD
-
LGW
16h 40m
2 stops
£426Multiple Airlines
Thu, 26 Feb - Mon, 2 Mar
TAP AIR PORTUGAL Logo
16:35 - 14:35
LGW
-
IAD
27h 00m
1 stop
TAP AIR PORTUGAL Logo
18:30 - 09:50
IAD
-
LGW
11h 20m
1 stop
£426TAP AIR PORTUGAL
Mon, 2 Mar - Mon, 9 Mar
Multiple Airlines Logo
14:00 - 07:24
LGW
-
IAD
22h 24m
1 stop
Multiple Airlines Logo
14:58 - 10:00
IAD
-
LGW
15h 02m
2 stops
£429Multiple Airlines
Thu, 5 Mar - Mon, 16 Mar
SWISS Logo
18:40 - 16:40
LGW
-
IAD
27h 00m
1 stop
SWISS Logo
20:30 - 17:50
IAD
-
LGW
16h 20m
1 stop
£430SWISS
Wed, 18 Feb - Sat, 28 Feb
SWISS Logo
18:40 - 16:40
LGW
-
IAD
27h 00m
1 stop
SWISS Logo
20:30 - 17:50
IAD
-
LGW
16h 20m
1 stop
£432SWISS
Wed, 18 Feb - Sat, 28 Feb
Icelandair Logo
11:55 - 18:30
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
20:40 - 10:55
IAD
-
LGW
10h 15m
1 stop
£433Icelandair
Mon, 23 Feb - Mon, 9 Mar
Multiple Airlines Logo
13:00 - 09:25
LGW
-
IAD
25h 25m
2 stops
Multiple Airlines Logo
08:15 - 10:00
IAD
-
LGW
20h 45m
1 stop
£435Multiple Airlines
Wed, 25 Feb - Mon, 2 Mar

TAP AIR PORTUGAL flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Our best TAP AIR PORTUGAL deals on London Gatwick Airport to Washington, D.C. Dulles Intl Airport flight tickets
TAP AIR PORTUGAL
11 Feb
LGW16:35London Gatwick
27h 40m
1 stop
IAD15:15Washington, D.C. Dulles Intl
17 Feb
IAD17:30Washington, D.C. Dulles Intl
17h 15m
1 stop
LGW15:45London Gatwick
£424
TAP AIR PORTUGAL
2 Mar
LGW16:35London Gatwick
27h 00m
1 stop
IAD14:35Washington, D.C. Dulles Intl
9 Mar
IAD18:30Washington, D.C. Dulles Intl
11h 20m
1 stop
LGW09:50London Gatwick
£426
TAP AIR PORTUGAL
7 Feb
LGW16:35London Gatwick
33h 25m
1 stop
IAD21:00Washington, D.C. Dulles Intl
16 Feb
IAD17:30Washington, D.C. Dulles Intl
17h 15m
1 stop
LGW15:45London Gatwick
£429

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

Our best Icelandair deals on London Gatwick Airport to Washington, D.C. Dulles Intl Airport flight tickets
Icelandair
9 Mar
LGW11:55London Gatwick
11h 35m
1 stop
IAD19:30Washington, D.C. Dulles Intl
17 Mar
IAD20:40Washington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55London Gatwick
£398
Icelandair
4 Mar
LGW11:55London Gatwick
11h 35m
1 stop
IAD18:30Washington, D.C. Dulles Intl
11 Mar
IAD20:40Washington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55London Gatwick
£400
Icelandair
23 Feb
LGW11:55London Gatwick
11h 35m
1 stop
IAD18:30Washington, D.C. Dulles Intl
9 Mar
IAD20:40Washington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55London Gatwick
£433

momondo Fare Finder

 
Customise your flight search to find flights from London Gatwick Airport to Washington, D.C. Dulles Intl 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 279,928 searches. Data last updated 2 February 2026.
Use the filters below to find and compare flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 9/3

11:55-19:30

1 stop11h 35m

Washington, D.C. Dulles Intl

Tue 17/3

20:40-10:55

1 stop10h 15m

£398

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 4/3

11:55-18:30

1 stop11h 35m

Washington, D.C. Dulles Intl

Wed 11/3

20:40-10:55

1 stop10h 15m

£400

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 20/2

18:40-16:40

1 stop27h 00m

Washington, D.C. Dulles Intl

Mon 2/3

17:45-17:50

1 stop19h 05m

£420

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 26/2

08:50-18:30

2 stops14h 40m

Washington, D.C. Dulles Intl

Mon 2/3

19:40-17:20

2 stops16h 40m

£426

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 2/3

16:35-14:35

1 stop27h 00m

Washington, D.C. Dulles Intl

Mon 9/3

18:30-09:50

1 stop11h 20m

£426

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 5/3

14:00-07:24

1 stop22h 24m

Washington, D.C. Dulles Intl

Mon 16/3

14:58-10:00

2 stops15h 02m

£429

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 18/2

18:40-16:40

1 stop27h 00m

Washington, D.C. Dulles Intl

Sat 28/2

20:30-17:50

1 stop16h 20m

£430

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 18/2

18:40-16:40

1 stop27h 00m

Washington, D.C. Dulles Intl

Sat 28/2

20:30-17:50

1 stop16h 20m

£432

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 23/2

11:55-18:30

1 stop11h 35m

Washington, D.C. Dulles Intl

Mon 9/3

20:40-10:55

1 stop10h 15m

£433

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 25/2

13:00-09:25

2 stops25h 25m

Washington, D.C. Dulles Intl

Mon 2/3

08:15-10:00

1 stop20h 45m

£435

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from London Gatwick Airport to Washington, D.C. Dulles Intl 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 Washington, D.C. Dulles Intl Airport?

The month of April is, on average, the cheapest month to fly to Washington, D.C. Dulles Intl Airport from London Gatwick Airport, with most prices found around £348. If you aren’t able to travel during the month of April, then book flights to Washington, D.C. Dulles Intl Airport from London Gatwick Airport during November instead. Flights to Washington, D.C. Dulles Intl Airport in November, while not as cheap as those in April, still average around £381.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

According to our data, Thursday is the cheapest day to fly to Washington, D.C. Dulles Intl Airport from London Gatwick Airport. The lowest ticket price found for a Thursday departure recently was £573. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. On the other hand, Sunday is the most expensive day to depart from London Gatwick Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £616.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

The cheapest time of day to fly to Washington, D.C. Dulles Intl Airport is at midday when flights can be purchased for as low as £583. In contrast, the most expensive time of day to depart to Washington, D.C. Dulles Intl Airport is in the morning when prices are around £586.

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

Are you open to changing your travel dates? Check out the ideal times to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Gatwick Airport to Washington, D.C. Dulles Intl Airport (LGW to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Fastest flight time

11h 20m

Direct flights

None
The fastest flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport takes 11h 20m
There are no direct flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from London Gatwick Airport to Washington, D.C. Dulles Intl Airport.
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  • How far is London Gatwick to Washington, D.C. Dulles Intl by plane?

    The distance between London Gatwick and Washington, D.C. Dulles Intl is about 3682.8 mi. In terms of flight time, this usually takes a little over 11h 20m.

  • When did momondo last update prices for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

  • How old do you have to be to fly from London Gatwick Airport to Washington, D.C. Dulles Intl 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 London Gatwick Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The necessary travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

Best airlines flying from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom £380Free CancellationRating
7.1
606 reviews
Search Icelandair flights

Travelling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Laurel
College Park
Fairfax
Arlington
Linthicum Heights
Alexandria
Glen Burnie
Lutherville Timonium
Front Royal
Winchester
Ellicott City
Cambridge
Lexington Park
Westminster
Woodbridge
Bethesda
Ashburn
Sterling
Rockville
Silver Spring

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Can I find flights from London to Washington, D.C. with flexible booking policies on momondo?

All flight searches from London to Washington, D.C. on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from London to Washington, D.C.?

momondo helps you find the best flight between London and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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Of course. momondo tracks the price of London to Washington, D.C. flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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