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Cheap flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport from £377

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 25/3. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — IAD
14 Dec — 21 Dec1
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 14 November 2025.

Round-trip from

£435

One-way from

£377

Popular in

July

Cheapest in

November

Average price

£397
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 4/3-11/3
  • 2 total stops
  • 26h 55m total
  • London to Washington, D.C.
Search Deals
25/3
  • 25/3
  • 1 total stop
  • 33h 35m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£137 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£17 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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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 14 November 2025.

Thu 27/1114:00LGW - IAD
1 stop22h 50mMultiple Airlines
Sat 6/1205:45IAD - LGW
2 stops23h 20mMultiple Airlines
Deal found 12/11£451
Thu 27/1114:00LGW - IAD
1 stop22h 50mMultiple Airlines
Thu 4/1219:18IAD - LGW
2 stops33h 42mMultiple Airlines
Deal found 12/11£452
Wed 26/1108:50LGW - IAD
1 stop11h 45mMultiple Airlines
Mon 1/1221:00IAD - LGW
1 stop10h 15mMultiple Airlines
Deal found 12/11£454
Wed 10/1211:55LGW - IAD
1 stop11h 35mIcelandair
Mon 15/1219:40IAD - LGW
1 stop10h 15mIcelandair
Deal found 13/11£461
Fri 21/1111:55LGW - IAD
1 stop11h 35mIcelandair
Tue 2/1219:40IAD - LGW
1 stop10h 15mIcelandair
Deal found 12/11£465
Thu 27/1114:00LGW - IAD
1 stop22h 50mMultiple Airlines
Fri 5/1221:20IAD - LGW
1 stop31h 45mMultiple Airlines
Deal found 12/11£471
Thu 27/1111:55LGW - IAD
1 stop11h 35mIcelandair
Sat 6/1219:40IAD - LGW
1 stop10h 15mIcelandair
Deal found 11/11£472
Thu 27/1111:55LGW - IAD
1 stop11h 35mIcelandair
Mon 1/1219:40IAD - LGW
1 stop10h 15mIcelandair
Deal found 12/11£473
Wed 26/1111:55LGW - IAD
1 stop11h 35mIcelandair
Thu 4/1219:40IAD - LGW
1 stop10h 15mIcelandair
Deal found 12/11£473
Thu 4/1216:00LGW - IAD
1 stop34h 00mTAP AIR PORTUGAL
Mon 8/1217:30IAD - LGW
2 stops22h 05mTAP AIR PORTUGAL
Deal found 13/11£475

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 14 November 2025.
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

Thu 27/11

14:00-07:50

1 stop22h 50m

Washington, D.C. Dulles Intl

Fri 5/12

21:20-10:05

1 stop31h 45m

£471

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 24/2

21:20-21:00

2 stops28h 40m

Washington, D.C. Dulles Intl

Tue 10/3

18:30-15:45

1 stop17h 15m

£483

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 25/11

11:55-18:30

1 stop11h 35m

Washington, D.C. Dulles Intl

Thu 4/12

19:40-10:55

1 stop10h 15m

£489

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 3/12

08:35-21:00

2 stops17h 25m

Washington, D.C. Dulles Intl

Fri 5/12

21:20-10:05

1 stop31h 45m

£498

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 24/1

13:10-16:40

2 stops32h 30m

Washington, D.C. Dulles Intl

Sat 31/1

20:30-22:35

2 stops21h 05m

£502

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 5/2

14:55-21:00

2 stops35h 05m

Washington, D.C. Dulles Intl

Sat 7/2

17:30-20:10

2 stops21h 40m

£503

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 4/12

10:10-21:00

2 stops39h 50m

Washington, D.C. Dulles Intl

Mon 8/12

17:30-15:45

1 stop17h 15m

£505

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 27/11

11:55-18:30

1 stop11h 35m

Washington, D.C. Dulles Intl

Fri 5/12

19:40-10:55

1 stop10h 15m

£540

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 25/12

16:00-21:00

1 stop34h 00m

Washington, D.C. Dulles Intl

Sun 11/1

22:30-20:35

2 stops17h 05m

£540

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 23/11

11:55-18:30

1 stop11h 35m

Washington, D.C. Dulles Intl

Tue 2/12

19:40-10:55

1 stop10h 15m

£542

Flights are sorted by cheapest return flights first.

Deals found on 11/11

Showing 1-10 of 23 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 £347). Flying from London Gatwick Airport to Washington, D.C. Dulles Intl Airport in August is currently the most expensive (average of £625). 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.

What is the cheapest time of day to fly from LGW to IAD?

Find hourly flight availability from Gatwick to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 14 November 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 59% on flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport by exploring options for tickets in the morning.

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 14 November 2025.
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
578 reviews
Check prices

Crew

8.0

Overall

7.1

Food

6.2

Comfort

6.9

Boarding

7.2

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
578 reviews
Icelandair
7.1
Good
578 reviews
Check prices

Crew

8.0

Overall

7.1

Food

6.2

Comfort

6.9

Boarding

7.2

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 £489, 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 £395 on this airline. Icelandair is 27% 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 £347). Flying from London Gatwick Airport to Washington, D.C. Dulles Intl Airport in August is currently the most expensive (average of £625). 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 14 November 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£395Average£556FlexibilityNo 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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