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Cheap flights from London Gatwick Airport to Washington, D.C. from £370

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 5/12. 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

Multiple Airlines Logo
08:55 - 18:55LGW-IAD
15h 00m1 stop
Multiple Airlines Logo
18:05 - 09:15IAD-LGW
11h 10m1 stop
£394Multiple Airlines
Find Deal
Thu, 23 Oct - Mon, 27 Oct
Icelandair Logo
15:40 - 22:10LGW-IAD
11h 30m1 stop
Icelandair Logo
23:15 - 14:40IAD-LGW
10h 25m1 stop
£396Icelandair
Find Deal
Fri, 3 Oct - Sun, 5 Oct
SWISS Logo
18:40 - 17:40LGW-IAD
27h 00m1 stop
SWISS Logo
17:25 - 17:50IAD-LGW
19h 25m1 stop
£397SWISS
Find Deal
Mon, 27 Oct - Mon, 3 Nov
Icelandair Logo
15:40 - 22:10LGW-IAD
11h 30m1 stop
Icelandair Logo
23:15 - 14:40IAD-LGW
10h 25m1 stop
£398Icelandair
Find Deal
Fri, 26 Sep - Fri, 3 Oct
SWISS Logo
18:35 - 16:15LGW-IAD
26h 40m1 stop
SWISS Logo
20:45 - 17:55IAD-LGW
16h 10m1 stop
£400SWISS
Find Deal
Wed, 1 Oct - Wed, 15 Oct
Icelandair Logo
15:40 - 22:10LGW-IAD
11h 30m1 stop
Icelandair Logo
20:30 - 14:40IAD-LGW
13h 10m1 stop
£400Icelandair
Find Deal
Sat, 4 Oct - Sun, 5 Oct
Multiple Airlines Logo
13:05 - 16:15LGW-IAD
32h 10m2 stops
Multiple Airlines Logo
10:20 - 18:25IAD-LGW
27h 05m2 stops
£401Multiple Airlines
Find Deal
Wed, 1 Oct - Wed, 8 Oct
Icelandair Logo
15:40 - 19:20LGW-IAD
32h 40m1 stop
Icelandair Logo
20:30 - 14:40IAD-LGW
13h 10m1 stop
£402Icelandair
Find Deal
Thu, 2 Oct - Tue, 7 Oct
Icelandair Logo
15:40 - 19:20LGW-IAD
32h 40m1 stop
Icelandair Logo
20:30 - 14:40IAD-LGW
13h 10m1 stop
£403Icelandair
Find Deal
Thu, 2 Oct - Tue, 7 Oct
SWISS Logo
18:40 - 15:30LGW-IAD
25h 50m1 stop
SWISS Logo
17:25 - 17:50IAD-LGW
19h 25m1 stop
£406SWISS
Find Deal
Thu, 6 Nov - Wed, 12 Nov

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
3 Oct
LGW15:40London Gatwick
11h 30m
1 stop
IAD22:10Washington, D.C. Dulles Intl
5 Oct
IAD23:15Washington, D.C. Dulles Intl
10h 25m
1 stop
LGW14:40London Gatwick
£396
Find similar
Icelandair
26 Sept
LGW15:40London Gatwick
11h 30m
1 stop
IAD22:10Washington, D.C. Dulles Intl
3 Oct
IAD23:15Washington, D.C. Dulles Intl
10h 25m
1 stop
LGW14:40London Gatwick
£398
Find similar
Icelandair
4 Oct
LGW15:40London Gatwick
11h 30m
1 stop
IAD22:10Washington, D.C. Dulles Intl
5 Oct
IAD20:30Washington, D.C. Dulles Intl
13h 10m
1 stop
LGW14:40London Gatwick
£400
Find similar

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
27 Oct
LGW18:40London Gatwick
27h 00m
1 stop
IAD17:40Washington, D.C. Dulles Intl
3 Nov
IAD17:25Washington, D.C. Dulles Intl
19h 25m
1 stop
LGW17:50London Gatwick
£397
Find similar
SWISS
30 Sept
LGW18:35London Gatwick
26h 40m
1 stop
IAD16:15Washington, D.C. Dulles Intl
7 Oct
IAD20:45Washington, D.C. Dulles Intl
16h 05m
1 stop
LGW17:50London Gatwick
£398
Find similar
SWISS
1 Oct
LGW18:35London Gatwick
26h 40m
1 stop
IAD16:15Washington, D.C. Dulles Intl
15 Oct
IAD20:45Washington, D.C. Dulles Intl
16h 10m
1 stop
LGW17:55London Gatwick
£400
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 17 September 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

08:55-18:55

1 stop15h 00m

Washington, D.C. Dulles Intl

Mon 27/10

18:05-09:15

1 stop11h 10m

£394

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 3/10

15:40-22:10

1 stop11h 30m

Washington, D.C. Dulles Intl

Sun 5/10

23:15-14:40

1 stop10h 25m

£396

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 27/10

18:40-17:40

1 stop27h 00m

Washington, D.C. Dulles Intl

Mon 3/11

17:25-17:50

1 stop19h 25m

£397

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 26/9

15:40-22:10

1 stop11h 30m

Washington, D.C. Dulles Intl

Fri 3/10

23:15-14:40

1 stop10h 25m

£398

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 1/10

18:35-16:15

1 stop26h 40m

Washington, D.C. Dulles Intl

Wed 15/10

20:45-17:55

1 stop16h 10m

£400

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 4/10

15:40-22:10

1 stop11h 30m

Washington, D.C. Dulles Intl

Sun 5/10

20:30-14:40

1 stop13h 10m

£400

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 1/10

13:05-16:15

2 stops32h 10m

Washington, D.C. Dulles Intl

Wed 8/10

10:20-18:25

2 stops27h 05m

£401

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

£402

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

£403

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 6/11

18:40-15:30

1 stop25h 50m

Washington, D.C. Dulles Intl

Wed 12/11

17:25-17:50

1 stop19h 25m

£406

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 £407. 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 November instead. Flights to Washington, D.C. Dulles Intl Airport in November, while not as cheap as those in February, still average around £420.

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 £590. 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 £668.

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 £519. 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 £623.

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 £537 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 £369 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

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 30m.

  • 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 £342Free CancellationRating
7.0
544 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
College Park
Essex
Alexandria
Fairfax
Bethesda
Oxon Hill
Gettysburg
Front Royal
Cambridge
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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