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Cheap flights from London Gatwick Airport to Washington, D.C. from £257

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 24/9. 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

TAP AIR PORTUGAL Logo
10:35 - 20:50LGW-IAD
15h 15m1 stop
TAP AIR PORTUGAL Logo
18:30 - 15:45IAD-LGW
17h 15m1 stop
£364TAP AIR PORTUGAL
Find Deal
Thu, 23 Oct - Mon, 27 Oct
Icelandair Logo
15:40 - 19:20LGW-IAD
32h 40m1 stop
Icelandair Logo
20:30 - 14:35IAD-LGW
13h 05m1 stop
£382Icelandair
Find Deal
Mon, 15 Sep - Mon, 22 Sep
Icelandair Logo
15:40 - 22:10LGW-IAD
11h 30m1 stop
Icelandair Logo
20:30 - 14:40IAD-LGW
13h 10m1 stop
£383Icelandair
Find Deal
Wed, 1 Oct - Tue, 7 Oct
TAP AIR PORTUGAL Logo
16:25 - 15:20LGW-IAD
27h 55m1 stop
TAP AIR PORTUGAL Logo
17:45 - 15:35IAD-LGW
16h 50m1 stop
£388TAP AIR PORTUGAL
Find Deal
Wed, 10 Sep - Mon, 15 Sep
Icelandair Logo
15:40 - 19:20LGW-IAD
32h 40m1 stop
Icelandair Logo
23:15 - 14:40IAD-LGW
10h 25m1 stop
£389Icelandair
Find Deal
Thu, 18 Sep - Wed, 1 Oct
TAP AIR PORTUGAL Logo
16:25 - 15:20LGW-IAD
27h 55m1 stop
TAP AIR PORTUGAL Logo
23:30 - 15:05IAD-LGW
11h 35m1 stop
£389TAP AIR PORTUGAL
Find Deal
Wed, 10 Sep - Wed, 29 Oct
Icelandair Logo
15:40 - 19:20LGW-IAD
32h 40m1 stop
Icelandair Logo
20:30 - 14:40IAD-LGW
13h 10m1 stop
£390Icelandair
Find Deal
Thu, 2 Oct - Tue, 7 Oct
Icelandair Logo
15:40 - 19:20LGW-IAD
32h 40m1 stop
Icelandair Logo
23:15 - 14:40IAD-LGW
10h 25m1 stop
£391Icelandair
Find Deal
Thu, 18 Sep - Wed, 1 Oct
Icelandair Logo
15:40 - 22:10LGW-IAD
11h 30m1 stop
Icelandair Logo
20:30 - 14:35IAD-LGW
13h 05m1 stop
£392Icelandair
Find Deal
Fri, 5 Sep - Mon, 15 Sep
Logo
08:50 - 19:59LGW-IAD
16h 09m2 stops
Logo
22:05 - 21:25IAD-LGW
18h 20m2 stops
£411
Find Deal
Tue, 26 Aug - Thu, 4 Sep

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
23 Oct
LGW10:35London Gatwick
15h 15m
1 stop
IAD20:50Washington, D.C. Dulles Intl
27 Oct
IAD18:30Washington, D.C. Dulles Intl
17h 15m
1 stop
LGW15:45London Gatwick
£364
Find similar
TAP AIR PORTUGAL
10 Sept
LGW16:25London Gatwick
27h 55m
1 stop
IAD15:20Washington, D.C. Dulles Intl
15 Sept
IAD17:45Washington, D.C. Dulles Intl
16h 50m
1 stop
LGW15:35London Gatwick
£388
Find similar
TAP AIR PORTUGAL
10 Sept
LGW16:25London Gatwick
27h 55m
1 stop
IAD15:20Washington, D.C. Dulles Intl
29 Oct
IAD23:30Washington, D.C. Dulles Intl
11h 35m
1 stop
LGW15:05London Gatwick
£389
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
15 Sept
LGW15:40London Gatwick
32h 40m
1 stop
IAD19:20Washington, D.C. Dulles Intl
22 Sept
IAD20:30Washington, D.C. Dulles Intl
13h 05m
1 stop
LGW14:35London Gatwick
£382
Find similar
Icelandair
1 Oct
LGW15:40London Gatwick
11h 30m
1 stop
IAD22:10Washington, D.C. Dulles Intl
7 Oct
IAD20:30Washington, D.C. Dulles Intl
13h 10m
1 stop
LGW14:40London Gatwick
£383
Find similar
Icelandair
18 Sept
LGW15:40London Gatwick
32h 40m
1 stop
IAD19:20Washington, D.C. Dulles Intl
1 Oct
IAD23:15Washington, D.C. Dulles Intl
10h 25m
1 stop
LGW14:40London Gatwick
£389
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 2 August 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

Thu 23/10

10:35-20:50

1 stop15h 15m

Washington, D.C. Dulles Intl

Mon 27/10

18:30-15:45

1 stop17h 15m

£364

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 15/9

15:40-19:20

1 stop32h 40m

Washington, D.C. Dulles Intl

Mon 22/9

20:30-14:35

1 stop13h 05m

£382

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 1/10

15:40-22:10

1 stop11h 30m

Washington, D.C. Dulles Intl

Tue 7/10

20:30-14:40

1 stop13h 10m

£383

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 10/9

16:25-15:20

1 stop27h 55m

Washington, D.C. Dulles Intl

Mon 15/9

17:45-15:35

1 stop16h 50m

£388

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 18/9

15:40-19:20

1 stop32h 40m

Washington, D.C. Dulles Intl

Wed 1/10

23:15-14:40

1 stop10h 25m

£389

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 10/9

16:25-15:20

1 stop27h 55m

Washington, D.C. Dulles Intl

Wed 29/10

23:30-15:05

1 stop11h 35m

£389

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 2/10

15:40-19:20

1 stop32h 40m

Washington, D.C. Dulles Intl

Tue 7/10

20:30-14:40

1 stop13h 10m

£390

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 18/9

15:40-19:20

1 stop32h 40m

Washington, D.C. Dulles Intl

Wed 1/10

23:15-14:40

1 stop10h 25m

£391

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 5/9

15:40-22:10

1 stop11h 30m

Washington, D.C. Dulles Intl

Mon 15/9

20:30-14:35

1 stop13h 05m

£392

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 26/8

08:50-19:59

2 stops16h 09m

Washington, D.C. Dulles Intl

Thu 4/9

22:05-21:25

2 stops18h 20m

£411

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 February is, on average, the cheapest month to fly to Washington, D.C. Dulles Intl Airport from London Gatwick Airport, with most prices found around £424. If you aren’t able to travel during the month of February, 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 February, still average around £439.

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 £620. 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 £695.

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 £536. 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 £649.

How far in advance should I book a flight to Washington, D.C. Dulles Intl Airport?

You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from London Gatwick Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around £557 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Dulles Intl Airport from London Gatwick Airport for as low as £380 on momondo.

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

Best price found

£257

Fastest flight time

11h 20m

Direct flights

None
The best one-way flight to Washington, D.C. Dulles Intl Airport from London Gatwick Airport in the past 72 hours is £257. The best return flight deal from London Gatwick Airport to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is £364.
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. Popular non-direct route for this connection is London Gatwick Airport - 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 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 £352Free CancellationRating
7.0
520 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
Winchester
Laurel
Essex
Alexandria
Fairfax
Manassas
Bethesda
Oxon Hill
Chantilly
College Park
Linthicum Heights
Gettysburg
Front Royal
Hanover
Cambridge
Ellicott City
Westminster
Arlington
Ashburn
Woodbridge

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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