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Cheap flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport from £317

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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — IAD
5 May — 12 May1
1 adult

Cheapflights Tip: The best prices from London Gatwick to Washington, D.C. Dulles Intl are usually found in February or April, 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 30 April 2025.

Round-trip from

£477

One-way from

£317

Popular in

July

Cheapest in

February

Average price

£433
13/6-20/6
  • 13/6-20/6
  • 2 total stops
  • 44h 15m total
  • London to Washington, D.C.
9/5
  • 9/5
  • 2 total stops
  • 35h 34m total
  • London to Washington, D.C.
Highest demand for flights based on searches. 22% potential increase in price (£117 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
Average for round-trip flights in April 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 30 April 2025.

Fri 13/610:00LGW - IAD
1 stop16h 12mMultiple Airlines
Fri 20/621:57IAD - LGW
1 stop28h 03mMultiple Airlines
Deal found 29/4£477
Thu 8/513:00LGW - IAD
1 stop11h 20mIcelandair
Wed 14/520:30IAD - LGW
1 stop13h 10mIcelandair
Deal found 29/4£477
Mon 8/910:35LGW - IAD
1 stop15h 15mTAP AIR PORTUGAL
Mon 6/1022:20IAD - LGW
1 stop12h 15mTAP AIR PORTUGAL
Deal found 29/4£524
Sat 1/1115:45LGW - IAD
1 stop31h 55mRoyal Air Maroc
Sun 9/1120:40IAD - LGW
1 stop13h 05mRoyal Air Maroc
Deal found 29/4£544
Tue 13/518:35LGW - IAD
1 stop26h 40mSWISS
Sun 18/520:45IAD - LGW
1 stop16h 05mSWISS
Deal found 29/4£594
Thu 6/1106:00LGW - IAD
1 stop18h 30mTurkish Airlines
Mon 10/1121:25IAD - LGW
1 stop19h 05mTurkish Airlines
Deal found 29/4£620

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 30 April 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

Fri 13/6

10:00-21:12

1 stop16h 12m

Washington, D.C. Dulles Intl

Fri 20/6

21:57-07:00

1 stop28h 03m

£477

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 23/10

10:35-20:50

1 stop15h 15m

Washington, D.C. Dulles Intl

Mon 27/10

18:30-09:50

1 stop11h 20m

£498

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 19/9

15:40-22:10

1 stop11h 30m

Washington, D.C. Dulles Intl

Sun 28/9

20:30-14:40

1 stop13h 10m

£500

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 13/5

18:35-16:15

1 stop26h 40m

Washington, D.C. Dulles Intl

Sun 18/5

20:45-17:50

1 stop16h 05m

£594

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 13/5

17:15-11:45

1 stop23h 30m

Washington, D.C. Dulles Intl

Sun 18/5

13:30-16:15

1 stop21h 45m

£609

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 5/6

12:00-00:28

2 stops17h 28m

Washington, D.C. Dulles Intl

Sun 8/6

06:00-10:00

2 stops23h 00m

£666

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 9/5

10:00-16:34

2 stops35h 34m

£317

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 6/5

16:25-15:20

1 stop27h 55m

£336

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 27/5

10:45-11:40

3 stops29h 55m

£386

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 3/7

16:40-19:05

1 stop31h 25m

£488

Flights are sorted by cheapest return flights first.

Deals found on 29/4

Showing 1-10 of 11 results
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 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 25 April 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 30 April 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.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

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 30 April 2025.
Get a feel of what it's like to fly with SWISS, Virgin Atlantic and Turkish Airlines from London to Washington, D.C. by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.2

Overall

7.5

Entertainment

6.7

Food

7.0

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

ZRH - ATH

The website is difficult to navigate. You pay for everything. The carry on baggage policy is complicated. The food choices were poor and the seat was uncomfortable.

Crew

8.2

Overall

7.5

Entertainment

6.7

Food

7.0

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

ZRH - ATH

The website is difficult to navigate. You pay for everything. The carry on baggage policy is complicated. The food choices were poor and the seat was uncomfortable.

Crew

8.2

Overall

7.5

Entertainment

6.7

Food

7.0

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

ZRH - ATH

The website is difficult to navigate. You pay for everything. The carry on baggage policy is complicated. The food choices were poor and the seat was uncomfortable.

Crew

8.2

Overall

7.5

Entertainment

6.7

Food

7.0

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

ZRH - ATH

The website is difficult to navigate. You pay for everything. The carry on baggage policy is complicated. The food choices were poor and the seat was uncomfortable.

Crew

8.2

Overall

7.5

Entertainment

6.7

Food

7.0

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

ZRH - ATH

The website is difficult to navigate. You pay for everything. The carry on baggage policy is complicated. The food choices were poor and the seat was uncomfortable.

Crew

8.2

Overall

7.5

Entertainment

6.7

Food

7.0

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

ZRH - ATH

The website is difficult to navigate. You pay for everything. The carry on baggage policy is complicated. The food choices were poor and the seat was uncomfortable.

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.
  • What are the cheapest airlines flying 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 TAP AIR PORTUGAL. Our recent data shows that you can find tickets from as low as £498 on this airline. Additional options worth looking into are Icelandair and SWISS, starting at £500 and £594 round-trip. TAP AIR PORTUGAL is 9% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport one-way?

    To fly one-way, consider booking your trip with TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at £336. WestJet flights start at £386 while deals on Royal Air Maroc start at £488 one-way.

  • 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 London Gatwick Airport?

Book flights to London Gatwick Airport if you plan to visit one of these locations
Silver Spring
Arlington
Woodbridge
College Park
Laurel
Tysons

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Top 3 airlines flying from Gatwick to Dulles Intl

Discover the top 3 airlines 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 30 April 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest£351Average£621FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
IcelandairCheapest£375Average£517FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£498Average£640FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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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