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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 23/8. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — IAD
11 Aug — 18 Aug1
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 July 2026.

Fri 23/1015:40
LGW
-
IAD
1 stop32h 40m
Icelandair
Sat 31/1020:40
IAD
-
LGW
1 stop10h 15m
Icelandair
Deal found 7/7£437
Thu 24/908:00
LGW
-
IAD
2 stops17h 35m
Multiple Airlines
Sun 27/922:35
IAD
-
LGW
2 stops18h 20m
Multiple Airlines
Deal found 11/7£440
Fri 13/1111:55
LGW
-
IAD
1 stop11h 35m
Icelandair
Tue 17/1119:40
IAD
-
LGW
1 stop10h 15m
Icelandair
Deal found 10/7£441
Tue 29/910:35
LGW
-
IAD
1 stop15h 00m
TAP AIR PORTUGAL
Sat 10/1017:05
IAD
-
LGW
1 stop11h 40m
TAP AIR PORTUGAL
Deal found 9/7£442
Wed 2/910:35
LGW
-
IAD
1 stop15h 00m
TAP AIR PORTUGAL
Tue 8/917:05
IAD
-
LGW
1 stop11h 40m
TAP AIR PORTUGAL
Deal found 8/7£442
Fri 18/914:00
LGW
-
IAD
1 stop34h 09m
Multiple Airlines
Thu 1/1007:00
IAD
-
LGW
2 stops22h 00m
Multiple Airlines
Deal found 9/7£443
Fri 30/1010:40
LGW
-
IAD
1 stop14h 55m
TAP AIR PORTUGAL
Fri 6/1122:30
IAD
-
LGW
1 stop12h 15m
TAP AIR PORTUGAL
Deal found 11/7£444
Tue 1/913:00
LGW
-
IAD
1 stop11h 20m
Icelandair
Sat 31/1020:40
IAD
-
LGW
1 stop10h 15m
Icelandair
Deal found 7/7£445
Fri 9/1015:40
LGW
-
IAD
1 stop32h 40m
Icelandair
Tue 13/1020:30
IAD
-
LGW
1 stop13h 10m
Icelandair
Deal found 10/7£445
Wed 30/915:40
LGW
-
IAD
1 stop32h 40m
Icelandair
Thu 15/1020:30
IAD
-
LGW
1 stop13h 10m
Icelandair
Deal found 7/7£446
Fri 6/1110:40
LGW
-
IAD
1 stop14h 55m
TAP AIR PORTUGAL
Wed 11/1122:30
IAD
-
LGW
1 stop11h 35m
TAP AIR PORTUGAL
Deal found 7/7£447

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 July 2026.

Round-trip from

£439

One-way from

£328

Popular in

September

Cheapest in

October

Average price

£591
Icelandair
  • Icelandair
  • 23/10-31/10
  • 2 total stops
  • 42h 55m total
  • London to Washington, D.C.
Search Deals
23/8
  • 23/8
  • 1 total stop
  • 24h 50m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (£8 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 July 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

Tue 1/9

16:25-15:10

1 stop27h 45m

Washington, D.C. Dulles Intl

Mon 14/9

17:40-15:35

1 stop16h 55m

£458
Fastest return journey

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 4/9

15:40-22:15

1 stop11h 35m

Washington, D.C. Dulles Intl

Mon 7/9

20:30-14:40

1 stop13h 10m

£480

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 27/9

10:25-19:35

1 stop14h 10m

Washington, D.C. Dulles Intl

Sun 11/10

21:45-16:00

1 stop13h 15m

£542

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 21/8

10:25-19:35

1 stop14h 10m

Washington, D.C. Dulles Intl

Mon 24/8

21:45-16:00

1 stop13h 15m

£542

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 25/12

16:40-15:15

1 stop27h 35m

Washington, D.C. Dulles Intl

Fri 1/1

22:30-08:20

2 stops28h 50m

£544

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 13/11

10:00-21:12

2 stops16h 12m

Washington, D.C. Dulles Intl

Tue 17/11

13:00-09:00

2 stops15h 00m

£553

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 8/10

21:20-14:25

2 stops22h 05m

Washington, D.C. Dulles Intl

Tue 13/10

22:35-15:35

1 stop12h 00m

£583

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 13/12

09:05-20:35

2 stops16h 30m

Washington, D.C. Dulles Intl

Thu 7/1

17:25-20:35

2 stops22h 10m

£594

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 21/8

10:25-00:34

2 stops19h 09m

Washington, D.C. Dulles Intl

Mon 24/8

19:26-16:00

2 stops15h 34m

£634

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 8/8

10:25-19:35

1 stop14h 10m

Washington, D.C. Dulles Intl

Tue 18/8

21:45-16:00

1 stop13h 15m

£636

Flights are sorted by cheapest return flights first.

Deals found on 10/7

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?

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 July 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
704 reviews
Check prices

Food

6.2

Crew

8.0

Overall

7.0

Comfort

6.9

Boarding

7.2

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Sara,Jul 2026

KEF - IAD

It was frustrating to be seated next to two children whose parents were not immediately adjacent to them. The parents were disengaged with their kids and I ended up having to assist/direct children who were not my own.
Icelandair
7.0
Good
704 reviews
Icelandair
7.0
Good
704 reviews
Check prices

Food

6.2

Crew

8.0

Overall

7.0

Comfort

6.9

Boarding

7.2

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Sara,Jul 2026

KEF - IAD

It was frustrating to be seated next to two children whose parents were not immediately adjacent to them. The parents were disengaged with their kids and I ended up having to assist/direct children who were not my own.

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 £480, TAP AIR PORTUGAL 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 £328 on this airline. Icelandair is 34% 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
Hanover
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 12 July 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£328Average£447FlexibilityNo 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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