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Cheap flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport from £309

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 17/6. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — IAD
2 Apr — 9 Apr1
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 28 March 2025.

Round-trip from

£438

One-way from

£309

Popular in

June

Cheapest in

February

Average price

£470
Icelandair
  • Icelandair
  • 30/4-11/5
  • 2 total stops
  • 45h 50m total
  • London to Washington, D.C.
17/6
  • 17/6
  • 2 total stops
  • 19h 55m total
  • London to Washington, D.C.
Highest demand for flights based on searches. 18% potential increase in price (£100 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).
Average for round-trip flights in March 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 28 March 2025.

Wed 30/415:40LGW - IAD
1 stop32h 40mIcelandair
Sun 11/520:30IAD - LGW
1 stop13h 10mIcelandair
Deal found 27/3£438
Sun 11/509:50LGW - IAD
1 stop14h 05mMultiple Airlines
Sun 18/517:20IAD - LGW
1 stop9h 35mMultiple Airlines
Deal found 26/3£453
Tue 21/1021:15LGW - IAD
2 stops23h 05mTAP AIR PORTUGAL
Tue 28/1018:30IAD - LGW
1 stop17h 15mTAP AIR PORTUGAL
Deal found 27/3£506
Thu 24/418:40LGW - IAD
1 stop25h 35mSWISS
Wed 30/420:45IAD - LGW
1 stop16h 10mSWISS
Deal found 27/3£546
Sat 3/512:20LGW - IAD
2 stops16h 36mAmerican Airlines
Thu 8/513:59IAD - LGW
2 stops13h 11mAmerican Airlines
Deal found 27/3£548
Mon 28/420:40LGW - IAD
1 stop23h 20mIberia
Sun 11/516:35IAD - LGW
1 stop13h 15mIberia
Deal found 28/3£568
Wed 23/411:35LGW - IAD
1 stop32h 25mBritish Airways
Mon 5/520:25IAD - LGW
2 stops32h 00mBritish Airways
Deal found 27/3£605
Thu 6/1106:00LGW - IAD
1 stop18h 30mTurkish Airlines
Mon 10/1113:10IAD - LGW
1 stop21h 50mTurkish Airlines
Deal found 27/3£615

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 28 March 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

Wed 30/4

15:40-19:20

1 stop32h 40m

Washington, D.C. Dulles Intl

Sun 11/5

20:30-14:40

1 stop13h 10m

£438

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 11/5

09:50-18:55

1 stop14h 05m

Washington, D.C. Dulles Intl

Sun 18/5

17:20-07:55

1 stop9h 35m

£453

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 3/9

21:15-15:20

2 stops23h 05m

Washington, D.C. Dulles Intl

Wed 17/9

17:50-14:00

1 stop15h 10m

£513

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 24/4

18:40-15:15

1 stop25h 35m

Washington, D.C. Dulles Intl

Wed 30/4

20:45-17:55

1 stop16h 10m

£546

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 3/5

12:20-23:56

2 stops16h 36m

Washington, D.C. Dulles Intl

Thu 8/5

13:59-08:10

2 stops13h 11m

£548

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 28/4

20:40-15:00

1 stop23h 20m

Washington, D.C. Dulles Intl

Sun 11/5

16:35-10:50

1 stop13h 15m

£568

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 23/4

11:35-15:00

1 stop32h 25m

Washington, D.C. Dulles Intl

Mon 5/5

20:25-09:25

2 stops32h 00m

£605

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 1/5

17:15-11:45

1 stop23h 30m

Washington, D.C. Dulles Intl

Fri 16/5

21:40-22:20

1 stop19h 40m

£618

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 17/6

05:55-20:50

2 stops19h 55m

£309

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 28/4

12:40-22:24

1 stop14h 44m

£326

Flights are sorted by cheapest return flights first.

Deals found on 27/3

Showing 1-10 of 13 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 21 March 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 28 March 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 28 March 2025.
Get a feel of what it's like to fly with Air Transat, SWISS 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.

Boarding

7.9

Comfort

7.4

Food

6.7

Overall

7.8

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Janice,Mar 2025

OPO - YYZ

I upgraded to Club Pass Business, and it made my trip a pleasant flight. The service was excellent and the food and drink options were good. The seats were comfy.

Boarding

7.9

Comfort

7.4

Food

6.7

Overall

7.8

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Janice,Mar 2025

OPO - YYZ

I upgraded to Club Pass Business, and it made my trip a pleasant flight. The service was excellent and the food and drink options were good. The seats were comfy.

Boarding

7.9

Comfort

7.4

Food

6.7

Overall

7.8

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Janice,Mar 2025

OPO - YYZ

I upgraded to Club Pass Business, and it made my trip a pleasant flight. The service was excellent and the food and drink options were good. The seats were comfy.

Boarding

7.9

Comfort

7.4

Food

6.7

Overall

7.8

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Janice,Mar 2025

OPO - YYZ

I upgraded to Club Pass Business, and it made my trip a pleasant flight. The service was excellent and the food and drink options were good. The seats were comfy.

Boarding

7.9

Comfort

7.4

Food

6.7

Overall

7.8

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Janice,Mar 2025

OPO - YYZ

I upgraded to Club Pass Business, and it made my trip a pleasant flight. The service was excellent and the food and drink options were good. The seats were comfy.

Boarding

7.9

Comfort

7.4

Food

6.7

Overall

7.8

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Janice,Mar 2025

OPO - YYZ

I upgraded to Club Pass Business, and it made my trip a pleasant flight. The service was excellent and the food and drink options were good. The seats were comfy.

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 Icelandair. Our recent data shows that you can find tickets from as low as £438 on this airline. Additional options worth looking into are TAP AIR PORTUGAL and SWISS, starting at £513 and £546 round-trip. Icelandair is 23% 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 Air Transat, which is currently one of the cheapest options available, starting at £326. TAP AIR PORTUGAL flights start at £347 while deals on Icelandair start at £447 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 4 airlines flying from Gatwick to Dulles Intl

Discover the top 4 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 28 March 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£279Average£540FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
IcelandairCheapest£360Average£519FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapest£364Average£644FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Virgin AtlanticCheapest£516Average£664FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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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