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Cheap flights from London Gatwick Airport to Washington, D.C. from £405

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 21/6. 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
1 adult, Economy, 0 bags
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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.
Icelandair Logo
15:40 - 19:20
LGW
-
IAD
32h 40m
1 stop
Icelandair Logo
20:30 - 11:45
IAD
-
LGW
10h 15m
1 stop
£411Icelandair
Fri, 15 May - Mon, 25 May
Icelandair Logo
15:40 - 19:20
LGW
-
IAD
32h 40m
1 stop
Icelandair Logo
23:20 - 14:40
IAD
-
LGW
10h 20m
1 stop
£413Icelandair
Wed, 20 May - Wed, 3 Jun
Icelandair Logo
15:40 - 19:20
LGW
-
IAD
32h 40m
1 stop
Icelandair Logo
23:20 - 14:40
IAD
-
LGW
10h 20m
1 stop
£414Icelandair
Wed, 27 May - Sun, 31 May
Icelandair Logo
15:40 - 19:20
LGW
-
IAD
32h 40m
1 stop
Icelandair Logo
20:30 - 14:40
IAD
-
LGW
13h 10m
1 stop
£415Icelandair
Tue, 14 Apr - Tue, 21 Apr
Icelandair Logo
15:40 - 22:15
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
23:20 - 14:40
IAD
-
LGW
10h 20m
1 stop
£418Icelandair
Wed, 20 May - Sun, 24 May
Icelandair Logo
15:40 - 19:20
LGW
-
IAD
32h 40m
1 stop
Icelandair Logo
23:20 - 14:40
IAD
-
LGW
10h 20m
1 stop
£421Icelandair
Tue, 19 May - Sun, 24 May
Icelandair Logo
15:40 - 22:15
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
20:30 - 14:40
IAD
-
LGW
13h 10m
1 stop
£424Icelandair
Wed, 27 May - Sun, 31 May
Icelandair Logo
15:40 - 19:20
LGW
-
IAD
32h 40m
1 stop
Icelandair Logo
20:30 - 14:40
IAD
-
LGW
13h 10m
1 stop
£425Icelandair
Sun, 3 May - Sat, 16 May
Icelandair Logo
15:40 - 22:15
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
23:20 - 14:40
IAD
-
LGW
10h 20m
1 stop
£434Icelandair
Sun, 7 Jun - Wed, 24 Jun
Icelandair Logo
15:40 - 22:15
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
23:20 - 14:40
IAD
-
LGW
10h 20m
1 stop
£436Icelandair
Wed, 20 May - Wed, 24 Jun

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

Our best SWISS deals on London Gatwick Airport to Washington, D.C. Dulles Intl Airport flight tickets
SWISS
12 Apr
LGW18:35London Gatwick
25h 40m
1 stop
IAD15:15Washington, D.C. Dulles Intl
19 Apr
IAD17:35Washington, D.C. Dulles Intl
19h 15m
1 stop
LGW17:50London Gatwick
£436
SWISS
25 Apr
LGW09:25London Gatwick
12h 20m
1 stop
IAD16:45Washington, D.C. Dulles Intl
28 Apr
IAD20:20Washington, D.C. Dulles Intl
16h 30m
1 stop
LGW17:50London Gatwick
£438
SWISS
13 Apr
LGW09:25London Gatwick
12h 20m
1 stop
IAD16:45Washington, D.C. Dulles Intl
19 Apr
IAD20:20Washington, D.C. Dulles Intl
16h 30m
1 stop
LGW17:50London Gatwick
£439

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
20 May
LGW15:40London Gatwick
32h 40m
1 stop
IAD19:20Washington, D.C. Dulles Intl
3 Jun
IAD23:20Washington, D.C. Dulles Intl
10h 20m
1 stop
LGW14:40London Gatwick
£413
Icelandair
27 May
LGW15:40London Gatwick
32h 40m
1 stop
IAD19:20Washington, D.C. Dulles Intl
31 May
IAD23:20Washington, D.C. Dulles Intl
10h 20m
1 stop
LGW14:40London Gatwick
£414
Icelandair
14 Apr
LGW15:40London Gatwick
32h 40m
1 stop
IAD19:20Washington, D.C. Dulles Intl
21 Apr
IAD20:30Washington, D.C. Dulles Intl
13h 10m
1 stop
LGW14:40London Gatwick
£415

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 23 March 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

Cheapest return flight

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 15/5

15:40-19:20

1 stop32h 40m

Washington, D.C. Dulles Intl

Mon 25/5

20:30-11:45

1 stop10h 15m

£411

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 20/5

15:40-19:20

1 stop32h 40m

Washington, D.C. Dulles Intl

Wed 3/6

23:20-14:40

1 stop10h 20m

£413

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 27/5

15:40-19:20

1 stop32h 40m

Washington, D.C. Dulles Intl

Sun 31/5

23:20-14:40

1 stop10h 20m

£414

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 14/4

15:40-19:20

1 stop32h 40m

Washington, D.C. Dulles Intl

Tue 21/4

20:30-14:40

1 stop13h 10m

£415
Fastest return journey

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 20/5

15:40-22:15

1 stop11h 35m

Washington, D.C. Dulles Intl

Sun 24/5

23:20-14:40

1 stop10h 20m

£418

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 19/5

15:40-19:20

1 stop32h 40m

Washington, D.C. Dulles Intl

Sun 24/5

23:20-14:40

1 stop10h 20m

£421

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 27/5

15:40-22:15

1 stop11h 35m

Washington, D.C. Dulles Intl

Sun 31/5

20:30-14:40

1 stop13h 10m

£424

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 3/5

15:40-19:20

1 stop32h 40m

Washington, D.C. Dulles Intl

Sat 16/5

20:30-14:40

1 stop13h 10m

£425

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 7/6

15:40-22:15

1 stop11h 35m

Washington, D.C. Dulles Intl

Wed 24/6

23:20-14:40

1 stop10h 20m

£434

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 20/5

15:40-22:15

1 stop11h 35m

Washington, D.C. Dulles Intl

Wed 24/6

23:20-14:40

1 stop10h 20m

£436

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 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 £581. 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 £631.

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 £585. 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 £598.

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.
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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 £390Free CancellationRating
7.0
625 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
College Park
Arlington
Fairfax
Linthicum Heights
Glen Burnie
Front Royal
Laurel
Lutherville Timonium
Winchester
Ellicott City
Cambridge
Lexington Park
Leesburg
Westminster
Woodbridge
Ashburn
Bethesda
Sterling
Alexandria
Silver Spring

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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