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Cheap flights from London Gatwick Airport to Washington, D.C. from £376

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 21/11. 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.
TAP AIR PORTUGAL Logo
16:25 - 15:05LGW-IAD
27h 40m1 stop
TAP AIR PORTUGAL Logo
17:05 - 09:45IAD-LGW
11h 40m1 stop
£411TAP AIR PORTUGAL
Find Deal
Wed, 15 Apr - Tue, 21 Apr
TAP AIR PORTUGAL Logo
16:35 - 15:35LGW-IAD
27h 00m1 stop
TAP AIR PORTUGAL Logo
18:30 - 09:50IAD-LGW
11h 20m1 stop
£413TAP AIR PORTUGAL
Find Deal
Mon, 9 Mar - Tue, 17 Mar
Multiple Airlines Logo
14:00 - 14:38LGW-IAD
29h 38m1 stop
Multiple Airlines Logo
15:33 - 10:05IAD-LGW
13h 32m1 stop
£416Multiple Airlines
Find Deal
Sat, 10 Jan - Sat, 17 Jan
TAP AIR PORTUGAL Logo
16:00 - 21:00LGW-IAD
34h 00m1 stop
TAP AIR PORTUGAL Logo
22:30 - 15:45IAD-LGW
12h 15m1 stop
£417TAP AIR PORTUGAL
Find Deal
Thu, 12 Feb - Sun, 15 Feb
Multiple Airlines Logo
14:00 - 07:50LGW-IAD
22h 50m1 stop
Multiple Airlines Logo
17:30 - 16:55IAD-LGW
18h 25m2 stops
£418Multiple Airlines
Find Deal
Thu, 20 Nov - Tue, 2 Dec
TAP AIR PORTUGAL Logo
10:40 - 21:00LGW-IAD
15h 20m1 stop
TAP AIR PORTUGAL Logo
17:30 - 15:45IAD-LGW
17h 15m1 stop
£420TAP AIR PORTUGAL
Find Deal
Fri, 13 Feb - Tue, 24 Feb
Icelandair Logo
11:55 - 18:30LGW-IAD
11h 35m1 stop
Icelandair Logo
19:40 - 10:55IAD-LGW
10h 15m1 stop
£459Icelandair
Find Deal
Wed, 12 Nov - Mon, 17 Nov
Icelandair Logo
11:55 - 18:30LGW-IAD
11h 35m1 stop
Icelandair Logo
19:40 - 10:55IAD-LGW
10h 15m1 stop
£461Icelandair
Find Deal
Thu, 27 Nov - Tue, 16 Dec
Icelandair Logo
11:55 - 18:30LGW-IAD
11h 35m1 stop
Icelandair Logo
19:40 - 10:55IAD-LGW
10h 15m1 stop
£463Icelandair
Find Deal
Thu, 4 Dec - Sun, 14 Dec
Icelandair Logo
11:55 - 18:30LGW-IAD
11h 35m1 stop
Icelandair Logo
19:40 - 10:55IAD-LGW
10h 15m1 stop
£464Icelandair
Find Deal
Wed, 26 Nov - Wed, 3 Dec

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
15 Apr
LGW16:25London Gatwick
27h 40m
1 stop
IAD15:05Washington, D.C. Dulles Intl
21 Apr
IAD17:05Washington, D.C. Dulles Intl
11h 40m
1 stop
LGW09:45London Gatwick
£411
Find similar
TAP AIR PORTUGAL
9 Mar
LGW16:35London Gatwick
27h 00m
1 stop
IAD15:35Washington, D.C. Dulles Intl
17 Mar
IAD18:30Washington, D.C. Dulles Intl
11h 20m
1 stop
LGW09:50London Gatwick
£413
Find similar
TAP AIR PORTUGAL
12 Feb
LGW16:00London Gatwick
34h 00m
1 stop
IAD21:00Washington, D.C. Dulles Intl
15 Feb
IAD22:30Washington, D.C. Dulles Intl
12h 15m
1 stop
LGW15:45London Gatwick
£417
Find similar

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
12 Nov
LGW11:55London Gatwick
11h 35m
1 stop
IAD18:30Washington, D.C. Dulles Intl
17 Nov
IAD19:40Washington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55London Gatwick
£459
Find similar
Icelandair
27 Nov
LGW11:55London Gatwick
11h 35m
1 stop
IAD18:30Washington, D.C. Dulles Intl
16 Dec
IAD19:40Washington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55London Gatwick
£461
Find similar
Icelandair
4 Dec
LGW11:55London Gatwick
11h 35m
1 stop
IAD18:30Washington, D.C. Dulles Intl
14 Dec
IAD19:40Washington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55London Gatwick
£463
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 31 October 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 15/4

16:25-15:05

1 stop27h 40m

Washington, D.C. Dulles Intl

Tue 21/4

17:05-09:45

1 stop11h 40m

£411

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 9/3

16:35-15:35

1 stop27h 00m

Washington, D.C. Dulles Intl

Tue 17/3

18:30-09:50

1 stop11h 20m

£413

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 10/1

14:00-14:38

1 stop29h 38m

Washington, D.C. Dulles Intl

Sat 17/1

15:33-10:05

1 stop13h 32m

£416

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 12/2

16:00-21:00

1 stop34h 00m

Washington, D.C. Dulles Intl

Sun 15/2

22:30-15:45

1 stop12h 15m

£417

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 20/11

14:00-07:50

1 stop22h 50m

Washington, D.C. Dulles Intl

Tue 2/12

17:30-16:55

2 stops18h 25m

£418

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 13/2

10:40-21:00

1 stop15h 20m

Washington, D.C. Dulles Intl

Tue 24/2

17:30-15:45

1 stop17h 15m

£420

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 12/11

11:55-18:30

1 stop11h 35m

Washington, D.C. Dulles Intl

Mon 17/11

19:40-10:55

1 stop10h 15m

£459

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 27/11

11:55-18:30

1 stop11h 35m

Washington, D.C. Dulles Intl

Tue 16/12

19:40-10:55

1 stop10h 15m

£461

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 4/12

11:55-18:30

1 stop11h 35m

Washington, D.C. Dulles Intl

Sun 14/12

19:40-10:55

1 stop10h 15m

£463

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 26/11

11:55-18:30

1 stop11h 35m

Washington, D.C. Dulles Intl

Wed 3/12

19:40-10:55

1 stop10h 15m

£464

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

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 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 £398. 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 £401.

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

According to our data, Wednesday is the cheapest day to fly to Washington, D.C. Dulles Intl Airport from London Gatwick Airport. The lowest ticket price found for a Wednesday departure recently was £613. 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 £693.

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 £537. 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 £645.

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

Direct flights

None
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 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 £395Free CancellationRating
7.1
562 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
Linthicum Heights
Bethesda
Front Royal
Cambridge
Winchester
Ellicott City
Westminster
Arlington
Ashburn
Woodbridge
Owings Mills
Sterling
Silver Spring
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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