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Cheap flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport from £420

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 13/7. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — IAD
1 Jul — 8 Jul1
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 1 June 2026.

Fri 9/1015:40
LGW
-
IAD
1 stop32h 40m
Icelandair
Sun 18/1023:20
IAD
-
LGW
1 stop10h 20m
Icelandair
Deal found 27/5£490
Thu 22/1015:40
LGW
-
IAD
1 stop32h 40m
Icelandair
Thu 5/1119:40
IAD
-
LGW
1 stop10h 15m
Icelandair
Deal found 28/5£491
Wed 10/614:00
LGW
-
IAD
1 stop27h 53m
Multiple Airlines
Thu 16/713:32
IAD
-
LGW
1 stop15h 28m
Multiple Airlines
Deal found 29/5£494
Tue 1/913:00
LGW
-
IAD
1 stop11h 20m
Icelandair
Mon 14/920:30
IAD
-
LGW
1 stop13h 10m
Icelandair
Deal found 29/5£495
Wed 10/614:00
LGW
-
IAD
1 stop27h 53m
Multiple Airlines
Thu 9/707:49
IAD
-
LGW
2 stops21h 11m
Multiple Airlines
Deal found 29/5£496
Fri 12/614:00
LGW
-
IAD
1 stop27h 28m
Multiple Airlines
Thu 23/713:32
IAD
-
LGW
1 stop15h 28m
Multiple Airlines
Deal found 29/5£498
Thu 4/613:00
LGW
-
IAD
1 stop11h 20m
Icelandair
Sun 7/623:20
IAD
-
LGW
1 stop10h 20m
Icelandair
Deal found 28/5£499
Tue 25/813:00
LGW
-
IAD
1 stop14h 15m
Icelandair
Mon 21/920:30
IAD
-
LGW
1 stop13h 10m
Icelandair
Deal found 27/5£502
Wed 10/614:00
LGW
-
IAD
1 stop27h 53m
Multiple Airlines
Wed 15/711:11
IAD
-
LGW
1 stop17h 49m
Multiple Airlines
Deal found 31/5£507
Thu 27/813:00
LGW
-
IAD
1 stop11h 20m
Icelandair
Tue 8/923:20
IAD
-
LGW
1 stop10h 20m
Icelandair
Deal found 29/5£508
Thu 1/1015:40
LGW
-
IAD
1 stop32h 40m
Icelandair
Sat 24/1020:40
IAD
-
LGW
1 stop13h 00m
Icelandair
Deal found 29/5£510

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 1 June 2026.

Round-trip from

£491

One-way from

£420

Popular in

June

Cheapest in

November

Average price

£721
Icelandair
  • Icelandair
  • 22/10-5/11
  • 2 total stops
  • 42h 55m total
  • London to Washington, D.C.
Search Deals
SWISS
  • SWISS
  • 13/7
  • 1 total stop
  • 12h 20m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£48 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 1 June 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 12/6

14:00-12:28

1 stop27h 28m

Washington, D.C. Dulles Intl

Tue 16/6

13:38-10:00

1 stop15h 22m

£626
Fastest return journey

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 12/8

10:25-19:35

1 stop14h 10m

Washington, D.C. Dulles Intl

Mon 17/8

18:15-09:40

1 stop10h 25m

£634

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 28/8

10:35-15:10

1 stop33h 35m

Washington, D.C. Dulles Intl

Wed 23/9

17:45-14:00

1 stop15h 15m

£640

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 27/8

10:35-20:35

1 stop15h 00m

Washington, D.C. Dulles Intl

Mon 21/9

22:35-09:45

1 stop30h 10m

£640

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 29/7

10:25-19:35

1 stop14h 10m

Washington, D.C. Dulles Intl

Thu 6/8

21:45-16:00

1 stop13h 15m

£640

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 28/8

10:35-20:35

1 stop15h 00m

Washington, D.C. Dulles Intl

Mon 21/9

22:35-09:45

1 stop30h 10m

£640

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 26/8

10:35-20:35

1 stop15h 00m

Washington, D.C. Dulles Intl

Sun 20/9

22:35-09:45

1 stop30h 10m

£640

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 13/10

17:00-11:52

2 stops23h 52m

Washington, D.C. Dulles Intl

Sun 18/10

18:15-16:00

1 stop16h 45m

£649

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 13/6

14:00-12:53

1 stop27h 53m

Washington, D.C. Dulles Intl

Sat 20/6

13:23-10:00

1 stop15h 37m

£651

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 26/8

10:35-20:35

1 stop15h 00m

Washington, D.C. Dulles Intl

Tue 22/9

17:05-09:45

1 stop11h 40m

£654

Flights are sorted by cheapest return flights first.

Deals found on 29/5

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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?

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 1 June 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
7.0
Good
663 reviews
Check prices

Comfort

6.9

Crew

8.0

Entertainment

6.9

Food

6.2

Overall

7.0

Boarding

7.2

Reviews

1 / 20
4.0
Okay

Daniel,May 2026

LHR - KEF

We had to change flights in Reykjavik and the outgoing flight was send to gate D23, where there were NO SEATS in the lounge. And in general, there were not enough seats for transferring passengers in general. After the three hour flight from London and then expecting a 7 hour flight to Seattle, having to stand & mill around for over an hour was rather unpleasant. We had booked Business Class and were assigned seats in the bulkhead seats, row 1. This made a MOST unpleasant 7 hour flight from Reykjavik to Seattle. The flight attendants had stored some of their carry-ons in the overhead bin just above us so it left us little room to place our carry-ons that was convenient. The seats in Business Class are too deep for shorter people and without ANY form of leg rest/support, we struggled to be comfortable for the entire flight.
Icelandair
7.0
Good
663 reviews
Icelandair
7.0
Good
663 reviews
Check prices

Comfort

6.9

Crew

8.0

Entertainment

6.9

Food

6.2

Overall

7.0

Boarding

7.2

Reviews

1 / 20
4.0
Okay

Daniel,May 2026

LHR - KEF

We had to change flights in Reykjavik and the outgoing flight was send to gate D23, where there were NO SEATS in the lounge. And in general, there were not enough seats for transferring passengers in general. After the three hour flight from London and then expecting a 7 hour flight to Seattle, having to stand & mill around for over an hour was rather unpleasant. We had booked Business Class and were assigned seats in the bulkhead seats, row 1. This made a MOST unpleasant 7 hour flight from Reykjavik to Seattle. The flight attendants had stored some of their carry-ons in the overhead bin just above us so it left us little room to place our carry-ons that was convenient. The seats in Business Class are too deep for shorter people and without ANY form of leg rest/support, we struggled to be comfortable for the entire flight.

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 £634, 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 £327 on this airline. Icelandair is 39% 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
Hanover
Oxon Hill
Gaithersburg
Woodbridge
Alexandria
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 1 June 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£327Average£573FlexibilityNo 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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