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Cheap flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport from £328

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 24/8. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — IAD
11 Sep — 18 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Gatwick to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Gatwick to Dulles Intl
Explore the most affordable flight options available from Gatwick to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 August 2026.

Sun 13/1211:55 -
1 stop11h 35m
Thu 7/119:40 -
1 stop10h 15m
Deal found 7/8£430
Thu 27/813:00 -
1 stop11h 20m
Thu 10/920:30 -
1 stop13h 10m
Deal found 11/8£431
Fri 4/915:40 -
1 stop11h 35m
Thu 10/920:30 -
1 stop13h 10m
Deal found 7/8£432
Tue 1/913:00 -
1 stop11h 20m
Sun 6/920:30 -
1 stop13h 10m
Deal found 11/8£432
Fri 28/815:40 -
1 stop11h 35m
Thu 10/920:30 -
1 stop13h 10m
Deal found 11/8£434
Thu 10/909:25 -
1 stop12h 20m
Wed 16/920:20 -
1 stop31h 05m
Deal found 11/8£435
Sun 6/918:35 -
1 stop25h 55m
Sat 12/920:20 -
1 stop31h 05m
Deal found 9/8£436
Thu 24/1211:55 -
1 stop11h 35m
Sun 3/119:40 -
1 stop10h 15m
Deal found 8/8£437
Fri 25/1211:55 -
1 stop11h 35m
Sun 3/119:40 -
1 stop10h 15m
Deal found 9/8£438
Tue 8/915:40 -
1 stop32h 40m
Mon 14/920:30 -
1 stop13h 10m
Deal found 8/8£438
Mon 31/815:40 -
1 stop32h 40m
Fri 18/923:20 -
1 stop10h 20m
Deal found 9/8£439
Fri 25/1211:55 -
1 stop11h 35m
Tue 5/119:40 -
1 stop10h 15m
Deal found 9/8£440

Find flight deals from Gatwick to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Gatwick (LGW) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 12 August 2026.

Round-trip from

£430

One-way from

£328

Popular in

July

Cheapest in

October

Average price

£485
Icelandair
  • Icelandair
  • 13/12-7/1
  • 2 total stops
  • 21h 50m total
  • London to Washington, D.C.
Search Deals
24/8
  • 24/8
  • 2 total stops
  • 28h 10m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£50 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Gatwick to Dulles Intl 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, Cheapflights users made 858,174 searches. Data last updated 12 August 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 London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Sat 3/10

10:25-19:35

1 stop14h 10m

Washington, D.C. Dulles Intl

Sat 10/10

21:45-16:00

1 stop13h 15m

£460

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Wed 26/8

15:40-19:20

1 stop32h 40m

Washington, D.C. Dulles Intl

Fri 18/9

23:20-14:40

1 stop10h 20m

£464
Fastest return journey

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Wed 30/12

11:55-18:30

1 stop11h 35m

Washington, D.C. Dulles Intl

Fri 12/3

19:40-10:55

1 stop10h 15m

£472

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Thu 24/9

10:25-19:35

1 stop14h 10m

Washington, D.C. Dulles Intl

Thu 1/10

21:45-16:00

1 stop13h 15m

£472

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Sun 13/12

10:40-20:35

1 stop14h 55m

Washington, D.C. Dulles Intl

Thu 7/1

17:25-20:35

2 stops22h 10m

£472

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Wed 16/9

16:25-15:10

1 stop27h 45m

Washington, D.C. Dulles Intl

Wed 30/9

22:35-11:20

2 stops31h 45m

£498

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Fri 5/2

16:40-15:15

1 stop27h 35m

Washington, D.C. Dulles Intl

Sun 7/2

22:30-20:35

2 stops17h 05m

£513

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Wed 23/12

09:35-15:15

2 stops34h 40m

Washington, D.C. Dulles Intl

Sun 3/1

22:30-20:35

2 stops17h 05m

£526

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Fri 2/10

10:35-20:35

1 stop15h 00m

Washington, D.C. Dulles Intl

Tue 13/10

22:35-20:25

2 stops16h 50m

£527

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Mon 24/8

10:25-19:35

1 stop14h 10m

Washington, D.C. Dulles Intl

Tue 22/9

18:15-09:25

1 stop10h 10m

£542

Flights are sorted by cheapest return flights first.

Deals found on 11/8

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Gatwick to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Gatwick with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

How much does it cost for a return flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

Airfare is typical for this route at the moment.

London Gatwick Airport to Washington, D.C. Dulles Intl Airport flights typically cost between £419 and £486 in December.
The cheapest return price found within the last 5 days was £430 on Icelandair (13 Dec–7 Jan).

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated 12 August 2026.
See what other customers who have flown with Icelandair from London Gatwick Airport to Washington, D.C. Dulles Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Icelandair
6.9
Okay
728 reviews
Check prices

Overall

6.9

Crew

8.0

Comfort

6.8

Boarding

7.1

Food

6.1

Entertainment

6.8

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

KEF - ORD

No food or snacks. You could buy them. You could also buy ear buds.
Icelandair
6.9
Okay
728 reviews
Icelandair
6.9
Okay
728 reviews
Check prices

Overall

6.9

Crew

8.0

Comfort

6.8

Boarding

7.1

Food

6.1

Entertainment

6.8

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

KEF - ORD

No food or snacks. You could buy them. You could also buy ear buds.

Related info for your journey

Find useful and relevant information for your journey from Gatwick to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

    For as low as £460, Delta can have you in Washington, D.C. Dulles Intl Airport from London Gatwick Airport in 14h 10m. The distance from London Gatwick Airport to Washington, D.C. Dulles Intl Airport is about 3683 mi. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport round-trip?

    Our cheapest airline available from London Gatwick Airport to Washington, D.C. Dulles Intl Airport is Icelandair. Our recent data shows that you can find tickets from as low as £326 on this airline. Icelandair is 33% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Gatwick to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Gatwick to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Gatwick to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Gatwick to Dulles Intl.

  • Can I find deals for business class flights from Gatwick to Dulles Intl?

    Yes. Cheapflights offers flight deals from Gatwick to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Silver Spring
Gaithersburg
Oxon Hill
Alexandria
Hanover
Woodbridge
Glen Burnie
Springfield
Sterling

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Top airline flying from Gatwick to Dulles Intl

Discover the top airline that operate flights from Gatwick to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 12 August 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£326Average£434FlexibilityNo cancel feeOn-time76%
Search Icelandair flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Gatwick to Dulles Intl?

When you search for this flight from Gatwick to Dulles Intl, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Gatwick to Dulles Intl?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Gatwick to Dulles Intl.

Can Cheapflights find flights from Gatwick to Dulles Intl with no change fees?

Yes! Cheapflights helps users easily find flights from Gatwick to Dulles Intl with no change fees.

Can Cheapflights notify me if prices for flights from Gatwick to Dulles Intl become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Dulles Intl from Gatwick today and book when prices fit your budget.

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