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Cheap flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport from £403

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 24/4. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — IAD
17 Feb — 24 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap 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 18 January 2026.

Round-trip from

£415

One-way from

£403

Popular in

July

Cheapest in

April

Average price

£519
SWISS
  • SWISS
  • 16/2-23/2
  • 2 total stops
  • 46h 05m total
  • London to Washington, D.C.
Search Deals
Icelandair
  • Icelandair
  • 24/4
  • 1 total stop
  • 32h 40m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£126 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Find 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 18 January 2026.

Mon 16/218:40
LGW
-
IAD
1 stop27h 00m
SWISS
Mon 23/217:45
IAD
-
LGW
1 stop19h 05m
SWISS
Deal found 17/1£415
Thu 12/208:50
LGW
-
IAD
2 stops14h 40m
Multiple Airlines
Mon 16/219:40
IAD
-
LGW
2 stops20h 20m
Multiple Airlines
Deal found 17/1£415
Sat 24/114:00
LGW
-
IAD
1 stop23h 33m
Multiple Airlines
Fri 30/109:35
IAD
-
LGW
1 stop19h 25m
Multiple Airlines
Deal found 17/1£419
Sat 31/118:40
LGW
-
IAD
1 stop25h 50m
SWISS
Sat 7/220:30
IAD
-
LGW
1 stop16h 20m
SWISS
Deal found 16/1£421
Tue 3/318:40
LGW
-
IAD
2 stops24h 55m
SWISS
Tue 10/317:25
IAD
-
LGW
1 stop20h 25m
SWISS
Deal found 17/1£423
Sat 12/909:25
LGW
-
IAD
1 stop12h 20m
SWISS
Sun 20/920:20
IAD
-
LGW
1 stop16h 30m
SWISS
Deal found 18/1£427
Tue 24/218:40
LGW
-
IAD
1 stop25h 25m
SWISS
Thu 5/320:30
IAD
-
LGW
1 stop16h 20m
SWISS
Deal found 18/1£429
Wed 14/1009:15
LGW
-
IAD
1 stop12h 30m
SWISS
Sun 18/1020:20
IAD
-
LGW
1 stop16h 30m
SWISS
Deal found 18/1£433
Wed 18/218:40
LGW
-
IAD
1 stop27h 00m
SWISS
Sun 22/220:30
IAD
-
LGW
1 stop16h 20m
SWISS
Deal found 18/1£435
Wed 25/218:40
LGW
-
IAD
1 stop25h 25m
SWISS
Wed 4/317:45
IAD
-
LGW
1 stop19h 05m
SWISS
Deal found 18/1£436

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 18 January 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

Gatwick

Fly to

Dulles Intl

Route

Depart

Return

Price

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 22/5

15:40-22:15

1 stop11h 35m

Washington, D.C. Dulles Intl

Fri 29/5

23:20-11:45

1 stop31h 25m

£415

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 18/2

18:40-14:35

2 stops24h 55m

Washington, D.C. Dulles Intl

Sat 28/2

20:30-17:50

1 stop16h 20m

£445

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 2/3

16:35-14:35

1 stop27h 00m

Washington, D.C. Dulles Intl

Mon 9/3

18:30-20:35

2 stops22h 05m

£486

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 9/3

21:25-15:35

2 stops22h 10m

Washington, D.C. Dulles Intl

Tue 17/3

18:30-15:45

1 stop17h 15m

£486

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 28/2

11:55-18:30

1 stop11h 35m

Washington, D.C. Dulles Intl

Sat 7/3

19:40-10:55

1 stop10h 15m

£498

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 27/2

10:45-21:00

2 stops15h 15m

Washington, D.C. Dulles Intl

Tue 3/3

17:30-15:45

1 stop17h 15m

£507

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 27/2

10:45-21:00

2 stops15h 15m

Washington, D.C. Dulles Intl

Tue 10/3

18:30-09:50

1 stop11h 20m

£507

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 21/5

10:40-19:35

1 stop13h 55m

Washington, D.C. Dulles Intl

Thu 28/5

21:45-15:50

1 stop13h 05m

£515

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 5/4

15:40-19:20

1 stop32h 40m

Washington, D.C. Dulles Intl

Thu 23/4

20:30-14:40

1 stop13h 10m

£530

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 5/4

15:40-19:20

1 stop32h 40m

Washington, D.C. Dulles Intl

Sun 26/4

20:30-14:40

1 stop13h 10m

£530

Flights are sorted by cheapest return flights first.

Deals found on 17/1

Showing 1-10 of 24 results
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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

What is the cheapest month to book a flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

Currently, February is the cheapest month in which you can book a flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport (average of £332). Flying from London Gatwick Airport to Washington, D.C. Dulles Intl Airport in August is currently the most expensive (average of £615). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 18 January 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
7.1
Good
597 reviews
Check prices

Comfort

7.0

Crew

8.0

Boarding

7.2

Food

6.2

Overall

7.1

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Dmitry,Oct 2025

KEF - EWR

It was a nice experience, the plane was clean and the crew was friendly. The boarding process went smoothly and there were no delays.
Icelandair
7.1
Good
597 reviews
Icelandair
7.1
Good
597 reviews
Check prices

Comfort

7.0

Crew

8.0

Boarding

7.2

Food

6.2

Overall

7.1

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Dmitry,Oct 2025

KEF - EWR

It was a nice experience, the plane was clean and the crew was friendly. The boarding process went smoothly and there were no delays.

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 £415, Icelandair can have you in Washington, D.C. Dulles Intl Airport from London Gatwick Airport in 11h 35m. 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 £375 on this airline. Icelandair is 30% 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.

  • What is the cheapest month to book a flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

    Currently, February is the cheapest month in which you can book a flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport (average of £332). Flying from London Gatwick Airport to Washington, D.C. Dulles Intl Airport in August is currently the most expensive (average of £615). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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
Hanover
Oxon Hill
Woodbridge
Arlington
Alexandria
College Park

Browse thousands of different options on Cheapflights for your next trip

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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 18 January 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£375Average£583FlexibilityNo 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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