Cheap flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport from £400

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 31/8. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — IAD
27 8월 — 3 9월1
1 adult

Cheapflights Tip: The best prices from London Gatwick to Washington, D.C. Dulles Intl are usually found in February or November, booked 54 days in advance, depart on a Tuesday or Thursday and return on a Monday

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 22 8월 2025.

Round-trip from

£437

One-way from

£400

Popular in

July

Cheapest in

February

Average price

£722
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 22/9-29/9
  • 2 total stops
  • 58h 20m total
  • London to Washington, D.C.
31/8
  • 31/8
  • 2 total stops
  • 30h 23m total
  • London to Washington, D.C.
Highest demand for flights based on searches. 23% potential increase in price (£125 potential increase over avg. return price).
Cheapest flight prices on average. 4% potential price decrease (£16 potential savings vs. average return price).
Average for round-trip flights in August 2025

Find flight deals from Gatwick to Dulles Intl

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 22 8월 2025.

월 22/916:25LGW - IAD
1 stop27h 55mTAP AIR PORTUGAL
월 29/922:20IAD - LGW
1 stop30h 25mTAP AIR PORTUGAL
Deal found 20/8£437
목 28/810:00LGW - IAD
1 stop14h 24mMultiple Airlines
금 19/915:15IAD - LGW
1 stop34h 45mMultiple Airlines
Deal found 20/8£437
월 6/1015:40LGW - IAD
1 stop32h 40mIcelandair
월 13/1020:30IAD - LGW
1 stop13h 05mIcelandair
Deal found 21/8£438
수 27/815:35LGW - IAD
1 stop11h 35mIcelandair
수 3/920:30IAD - LGW
1 stop10h 15mIcelandair
Deal found 20/8£440
목 4/914:00LGW - IAD
1 stop33h 19mMultiple Airlines
일 21/915:15IAD - LGW
1 stop34h 40mMultiple Airlines
Deal found 21/8£440
수 5/1113:10LGW - IAD
2 stops33h 05mMultiple Airlines
수 12/1120:30IAD - LGW
2 stops20h 10mMultiple Airlines
Deal found 21/8£443
목 4/914:50LGW - IAD
2 stops34h 09mMultiple Airlines
목 11/922:05IAD - LGW
2 stops18h 20mMultiple Airlines
Deal found 20/8£444
수 1/1017:25LGW - IAD
2 stops32h 25mMultiple Airlines
토 4/1017:00IAD - LGW
1 stop11h 45mMultiple Airlines
Deal found 20/8£446
일 5/1008:55LGW - IAD
2 stops15h 25mMultiple Airlines
일 12/1020:30IAD - LGW
2 stops19h 25mMultiple Airlines
Deal found 21/8£447
금 3/1015:40LGW - IAD
1 stop11h 30mIcelandair
월 13/1020:30IAD - LGW
1 stop13h 05mIcelandair
Deal found 20/8£448

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 22 8월 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

월 22/9

16:25-15:20

1 stop27h 55m

Washington, D.C. Dulles Intl

월 29/9

22:20-09:45

1 stop30h 25m

£437

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

화 2/9

21:45-15:20

2 stops46h 35m

Washington, D.C. Dulles Intl

토 27/9

19:14-10:10

1 stop33h 56m

£438

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

월 6/10

15:40-19:20

1 stop32h 40m

Washington, D.C. Dulles Intl

월 13/10

20:30-14:35

1 stop13h 05m

£438

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

토 20/9

14:00-18:14

1 stop33h 14m

Washington, D.C. Dulles Intl

일 28/9

19:14-06:20

2 stops30h 06m

£438

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

수 8/10

15:40-22:10

1 stop11h 30m

Washington, D.C. Dulles Intl

월 13/10

20:30-14:35

1 stop13h 05m

£440

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

목 4/9

14:00-18:19

1 stop33h 19m

Washington, D.C. Dulles Intl

일 21/9

15:15-06:55

1 stop34h 40m

£440

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

수 5/11

13:10-17:15

2 stops33h 05m

Washington, D.C. Dulles Intl

수 12/11

20:30-21:40

2 stops20h 10m

£443

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

목 4/9

14:50-19:59

2 stops34h 09m

Washington, D.C. Dulles Intl

목 11/9

22:05-21:25

2 stops18h 20m

£444

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

일 15/2

11:55-18:30

1 stop11h 35m

Washington, D.C. Dulles Intl

화 16/6

23:35-14:40

1 stop10h 05m

£445

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

수 1/10

17:25-20:50

2 stops32h 25m

Washington, D.C. Dulles Intl

토 4/10

17:00-09:45

1 stop11h 45m

£446

Flights are sorted by cheapest return flights first.

Deals found on 21/8

Showing 1-10 of 19 results
1
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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

How far ahead should I book a flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the optimal time to book a return flight from Gatwick to Dulles Intl. Price data was last updated on 8 August 2025.

To ensure you get the cheapest price possible for a flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport, you should look to book at least 54 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport (average of £599). Flying from London Gatwick Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). 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 22 8월 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 27% on flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport by exploring options for tickets at midday.

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 22 8월 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.

Food

6.2

Overall

7.0

Boarding

7.1

Comfort

6.9

Crew

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

KEF - EWR

The airport in Reykjavik had too few seats at the departure gate. Otherwise the airport experience was fine. The flight was timely and smooth. The airplane was well maintained and staff pleasant and efficient

Food

6.2

Overall

7.0

Boarding

7.1

Comfort

6.9

Crew

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

KEF - EWR

The airport in Reykjavik had too few seats at the departure gate. Otherwise the airport experience was fine. The flight was timely and smooth. The airplane was well maintained and staff pleasant and efficient

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 £437, TAP AIR PORTUGAL can have you in Washington, D.C. Dulles Intl Airport from London Gatwick Airport in 27h 55m. 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 £347 on this airline. Icelandair is 36% 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, January is the cheapest month in which you can book a flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport (average of £599). Flying from London Gatwick Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). 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
College Park
Laurel
Tysons

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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 22 8월 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£347Average£533FlexibilityNo cancel feeOn-time76%
Search Icelandair flights

Fly with Cheapflights

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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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