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Cheap flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport from £333

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 15/9. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — IAD
28 Aug — 4 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 29 July 2026.

Thu 10/913:00
LGW
-
IAD
1 stop11h 20m
Icelandair
Thu 17/920:30
IAD
-
LGW
1 stop13h 10m
Icelandair
Deal found 27/7£440
Tue 8/915:40
LGW
-
IAD
1 stop32h 40m
Icelandair
Tue 15/923:20
IAD
-
LGW
1 stop10h 20m
Icelandair
Deal found 24/7£441
Tue 25/815:40
LGW
-
IAD
1 stop32h 40m
Icelandair
Sat 29/820:30
IAD
-
LGW
1 stop10h 15m
Icelandair
Deal found 24/7£442
Tue 1/1216:35
LGW
-
IAD
1 stop33h 00m
TAP AIR PORTUGAL
Tue 8/1217:25
IAD
-
LGW
1 stop11h 25m
TAP AIR PORTUGAL
Deal found 27/7£442
Thu 27/813:00
LGW
-
IAD
1 stop11h 20m
Icelandair
Thu 17/920:30
IAD
-
LGW
1 stop13h 10m
Icelandair
Deal found 28/7£443
Thu 17/915:40
LGW
-
IAD
1 stop32h 40m
Icelandair
Thu 24/920:30
IAD
-
LGW
1 stop13h 10m
Icelandair
Deal found 27/7£444
Wed 23/915:40
LGW
-
IAD
1 stop32h 40m
Icelandair
Tue 29/920:30
IAD
-
LGW
1 stop13h 10m
Icelandair
Deal found 27/7£445
Thu 22/1010:35
LGW
-
IAD
1 stop15h 00m
TAP AIR PORTUGAL
Mon 9/1117:25
IAD
-
LGW
1 stop17h 20m
TAP AIR PORTUGAL
Deal found 24/7£445
Wed 2/915:40
LGW
-
IAD
1 stop11h 35m
Icelandair
Tue 8/923:20
IAD
-
LGW
1 stop10h 20m
Icelandair
Deal found 24/7£446
Fri 4/915:40
LGW
-
IAD
1 stop32h 40m
Icelandair
Tue 8/923:20
IAD
-
LGW
1 stop10h 20m
Icelandair
Deal found 27/7£448
Thu 8/1015:40
LGW
-
IAD
1 stop32h 40m
Icelandair
Tue 13/1020:30
IAD
-
LGW
1 stop13h 10m
Icelandair
Deal found 24/7£449
Wed 30/916:25
LGW
-
IAD
1 stop27h 45m
TAP AIR PORTUGAL
Sun 11/1022:35
IAD
-
LGW
1 stop30h 10m
TAP AIR PORTUGAL
Deal found 25/7£450

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 29 July 2026.

Round-trip from

£440

One-way from

£333

Popular in

July

Cheapest in

October

Average price

£645
Icelandair
  • Icelandair
  • 10/9-17/9
  • 2 total stops
  • 24h 30m total
  • London to Washington, D.C.
Search Deals
15/9
  • 15/9
  • 2 total stops
  • 28h 40m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£74 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£12 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 29 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

Wed 7/10

10:25-00:42

2 stops19h 17m

Washington, D.C. Dulles Intl

Wed 14/10

08:03-09:25

2 stops20h 22m

£518

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 8/9

10:35-00:41

2 stops19h 06m

Washington, D.C. Dulles Intl

Tue 15/9

21:45-16:00

1 stop13h 15m

£527

LondonWashington, D.C.

LGW - IAD

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

£530

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 14/9

10:25-09:09

2 stops27h 44m

Washington, D.C. Dulles Intl

Mon 28/9

08:08-09:40

2 stops20h 32m

£557

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 17/10

09:25-16:45

1 stop12h 20m

Washington, D.C. Dulles Intl

Sat 7/11

20:10-17:50

1 stop16h 40m

£563

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 18/9

21:15-15:10

2 stops22h 55m

Washington, D.C. Dulles Intl

Mon 21/9

17:40-15:35

1 stop16h 55m

£579

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 21/8

10:25-23:21

2 stops17h 56m

Washington, D.C. Dulles Intl

Sun 6/9

21:45-16:00

1 stop13h 15m

£581

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 9/9

17:25-18:55

2 stops30h 30m

Washington, D.C. Dulles Intl

Wed 16/9

17:00-17:55

2 stops19h 55m

£606

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 19/9

10:25-23:14

2 stops17h 49m

Washington, D.C. Dulles Intl

Sat 26/9

18:15-09:20

1 stop10h 05m

£616

LondonWashington, D.C.

LGW - IAD

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 stops41h 05m

£657

Flights are sorted by cheapest return flights first.

Deals found on 27/7

Showing 1-10 of 21 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

What’s the top stopover airport for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

Share of one-stop return flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Reykjavik (KEF) – chosen by Cheapflights users on 52% of one-stop itineraries from London Gatwick Airport to Washington, D.C. Dulles Intl Airport on Cheapflights.

What’s the cheapest stopover airport for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

Average return fare for one-stop flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Casablanca (CMN) is the most affordable one-stop option, with an average return flight price of £552.

What’s the fastest stopover option from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

Shortest average travel time for one-stop one-way flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Reykjavik (KEF) have the shortest average one-way travel time for one-stop routes: 11h 34m.

Which airport typically offers the quickest stopover for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

Average stopover duration for one-stop one-way flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 1h 23m.

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 29 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
716 reviews
Check prices

Boarding

7.2

Comfort

6.9

Entertainment

6.9

Food

6.1

Overall

7.0

Crew

8.0

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
7.0
Good
716 reviews
Icelandair
7.0
Good
716 reviews
Check prices

Boarding

7.2

Comfort

6.9

Entertainment

6.9

Food

6.1

Overall

7.0

Crew

8.0

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 £563, Virgin Atlantic can have you in Washington, D.C. Dulles Intl Airport from London Gatwick Airport in 12h 20m. 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 £331 on this airline. Icelandair is 35% 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 29 July 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£331Average£451FlexibilityNo 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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