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Cheap flights from London Gatwick Airport to Washington, D.C. from £429

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 23/12. 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 London Gatwick Airport to Washington, D.C.

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
08:50 - 15:35
LGW
-
IAD
11h 45m1 stop
Multiple Airlines Logo
17:05 - 11:10
IAD
-
LGW
13h 05m1 stop
£464Multiple Airlines
Wed, 14 Jan - Wed, 21 Jan
Icelandair Logo
11:55 - 18:30
LGW
-
IAD
11h 35m1 stop
Icelandair Logo
19:40 - 10:55
IAD
-
LGW
10h 15m1 stop
£465Icelandair
Tue, 24 Feb - Thu, 5 Mar
TAP AIR PORTUGAL Logo
10:40 - 22:00
LGW
-
IAD
15h 20m1 stop
TAP AIR PORTUGAL Logo
18:30 - 09:50
IAD
-
LGW
11h 20m1 stop
£467TAP AIR PORTUGAL
Wed, 18 Mar - Tue, 24 Mar
Icelandair Logo
11:55 - 18:30
LGW
-
IAD
11h 35m1 stop
Icelandair Logo
20:40 - 10:55
IAD
-
LGW
10h 15m1 stop
£467Icelandair
Wed, 4 Mar - Wed, 11 Mar
TAP AIR PORTUGAL Logo
16:35 - 21:00
LGW
-
IAD
33h 25m1 stop
TAP AIR PORTUGAL Logo
17:30 - 09:50
IAD
-
LGW
11h 20m1 stop
£468TAP AIR PORTUGAL
Tue, 13 Jan - Tue, 20 Jan
TAP AIR PORTUGAL Logo
10:40 - 22:00
LGW
-
IAD
15h 20m1 stop
TAP AIR PORTUGAL Logo
23:30 - 09:50
IAD
-
LGW
30h 20m1 stop
£470TAP AIR PORTUGAL
Fri, 20 Mar - Sun, 22 Mar
TAP AIR PORTUGAL Logo
21:20 - 21:00
LGW
-
IAD
28h 40m2 stops
TAP AIR PORTUGAL Logo
17:30 - 09:50
IAD
-
LGW
11h 20m1 stop
£471TAP AIR PORTUGAL
Tue, 13 Jan - Tue, 20 Jan
Icelandair Logo
11:55 - 18:30
LGW
-
IAD
11h 35m1 stop
Icelandair Logo
19:40 - 10:55
IAD
-
LGW
10h 15m1 stop
£472Icelandair
Thu, 22 Jan - Tue, 3 Feb
Multiple Airlines Logo
09:10 - 21:00
LGW
-
IAD
16h 50m2 stops
Multiple Airlines Logo
13:31 - 10:00
IAD
-
LGW
15h 29m1 stop
£473Multiple Airlines
Sun, 25 Jan - Mon, 26 Jan
TAP AIR PORTUGAL Logo
10:45 - 21:00
LGW
-
IAD
15h 15m2 stops
TAP AIR PORTUGAL Logo
17:30 - 09:50
IAD
-
LGW
11h 20m1 stop
£473TAP AIR PORTUGAL
Fri, 16 Jan - Thu, 29 Jan

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
24 Feb
LGW11:55London Gatwick
11h 35m
1 stop
IAD18:30Washington, D.C. Dulles Intl
5 Mar
IAD19:40Washington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55London Gatwick
£465
Find similar
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
£467
Find similar
Icelandair
22 Jan
LGW11:55London Gatwick
11h 35m
1 stop
IAD18:30Washington, D.C. Dulles Intl
3 Feb
IAD19:40Washington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55London Gatwick
£472
Find similar

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
18 Mar
LGW10:40London Gatwick
15h 20m
1 stop
IAD22:00Washington, D.C. Dulles Intl
24 Mar
IAD18:30Washington, D.C. Dulles Intl
11h 20m
1 stop
LGW09:50London Gatwick
£467
Find similar
TAP AIR PORTUGAL
13 Jan
LGW16:35London Gatwick
33h 25m
1 stop
IAD21:00Washington, D.C. Dulles Intl
20 Jan
IAD17:30Washington, D.C. Dulles Intl
11h 20m
1 stop
LGW09:50London Gatwick
£468
Find similar
TAP AIR PORTUGAL
13 Jan
LGW21:20London Gatwick
28h 40m
2 stops
IAD21:00Washington, D.C. Dulles Intl
20 Jan
IAD17:30Washington, D.C. Dulles Intl
11h 20m
1 stop
LGW09:50London Gatwick
£471
Find similar

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 18 December 2025.
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

Wed 14/1

08:50-15:35

1 stop11h 45m

Washington, D.C. Dulles Intl

Wed 21/1

17:05-11:10

1 stop13h 05m

£464

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 24/2

11:55-18:30

1 stop11h 35m

Washington, D.C. Dulles Intl

Thu 5/3

19:40-10:55

1 stop10h 15m

£465

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 18/3

10:40-22:00

1 stop15h 20m

Washington, D.C. Dulles Intl

Tue 24/3

18:30-09:50

1 stop11h 20m

£467

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

£467

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 13/1

16:35-21:00

1 stop33h 25m

Washington, D.C. Dulles Intl

Tue 20/1

17:30-09:50

1 stop11h 20m

£468

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 20/3

10:40-22:00

1 stop15h 20m

Washington, D.C. Dulles Intl

Sun 22/3

23:30-09:50

1 stop30h 20m

£470

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 13/1

21:20-21:00

2 stops28h 40m

Washington, D.C. Dulles Intl

Tue 20/1

17:30-09:50

1 stop11h 20m

£471

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 22/1

11:55-18:30

1 stop11h 35m

Washington, D.C. Dulles Intl

Tue 3/2

19:40-10:55

1 stop10h 15m

£472

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 25/1

09:10-21:00

2 stops16h 50m

Washington, D.C. Dulles Intl

Mon 26/1

13:31-10:00

1 stop15h 29m

£473

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 16/1

10:45-21:00

2 stops15h 15m

Washington, D.C. Dulles Intl

Thu 29/1

17:30-09:50

1 stop11h 20m

£473

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 typical price of a round-trip flight between London Gatwick Airport and Washington, D.C. Dulles Intl Airport?

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

The month of November is, on average, the cheapest month to fly to Washington, D.C. Dulles Intl Airport from London Gatwick Airport, with most prices found around £390. If you aren’t able to travel during the month of November, then book flights to Washington, D.C. Dulles Intl Airport from London Gatwick Airport during April instead. Flights to Washington, D.C. Dulles Intl Airport in April, while not as cheap as those in November, still average around £396.

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 £592. 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 £652.

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 in the evening when flights can be purchased for as low as £530. In contrast, the most expensive time of day to depart to Washington, D.C. Dulles Intl Airport is in the afternoon when prices are around £611.

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 35m

Direct flights

None
The fastest flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport takes 11h 35m
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.
Search flight deals

  • 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 35m.

  • 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 £376Free CancellationRating
7.0
591 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
Alexandria
Fairfax
Arlington
Linthicum Heights
Bethesda
Glen Burnie
Front Royal
Lutherville Timonium
Winchester
Ellicott City
Cambridge
Westminster
Woodbridge
Ashburn
Sterling
Silver Spring
Owings Mills
National Harbor

Why use momondo?

Why should I use momondo to find a flight deal from London to Washington, D.C.?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from London to Washington, D.C.. momondo saves you time and could save you money on your trip.

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.

I’m not ready to book a flight from London to Washington, D.C. right now. Can momondo alert me if prices change?

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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