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Cheap flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport from £388

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 23/8. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — IAD
9 Jul — 16 Jul1
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 4 July 2025.

Round-trip from

£481

One-way from

£388

Popular in

July

Cheapest in

February

Average price

£765
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 21/8-24/8
  • 2 total stops
  • 50h 10m total
  • London to Washington, D.C.
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23/8
  • 23/8
  • 2 total stops
  • 29h 22m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£121 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£16 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
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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 4 July 2025.

Thu 21/810:35LGW - IAD
1 stop33h 45mTAP AIR PORTUGAL
Sun 24/817:45IAD - LGW
1 stop16h 25mTAP AIR PORTUGAL
Deal found 3/7£481
Sun 10/815:40LGW - IAD
1 stop32h 40mIcelandair
Fri 15/823:15IAD - LGW
1 stop31h 30mIcelandair
Deal found 3/7£482
Fri 22/810:00LGW - IAD
1 stop14h 24mMultiple Airlines
Tue 26/823:15IAD - LGW
1 stop10h 25mMultiple Airlines
Deal found 2/7£485
Mon 18/812:00LGW - IAD
1 stop12h 43mVirgin Atlantic
Mon 25/806:00IAD - LGW
2 stops23h 00mVirgin Atlantic
Deal found 3/7£525
Mon 13/1018:35LGW - IAD
1 stop26h 40mSWISS
Mon 3/1122:20IAD - LGW
2 stops14h 30mSWISS
Deal found 3/7£528

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 4 July 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 21/8

10:35-15:20

1 stop33h 45m

Washington, D.C. Dulles Intl

Sun 24/8

17:45-15:10

1 stop16h 25m

£481

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 10/8

15:40-19:20

1 stop32h 40m

Washington, D.C. Dulles Intl

Fri 15/8

23:15-11:45

1 stop31h 30m

£482

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 22/8

10:00-19:24

1 stop14h 24m

Washington, D.C. Dulles Intl

Tue 26/8

23:15-14:40

1 stop10h 25m

£485

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 18/8

12:00-19:43

1 stop12h 43m

Washington, D.C. Dulles Intl

Mon 25/8

06:00-10:00

2 stops23h 00m

£525

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 13/10

18:35-16:15

1 stop26h 40m

Washington, D.C. Dulles Intl

Mon 3/11

22:20-17:50

2 stops14h 30m

£528

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 23/8

10:45-11:07

2 stops29h 22m

£388

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 13/10

10:35-20:50

1 stop15h 15m

£393

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 8/9

15:40-19:20

1 stop32h 40m

£410

Flights are sorted by cheapest return flights first.

Deals found on 3/7

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 27 June 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 4 July 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.

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 4 July 2025.
See what other customers who have flown with SWISS, Virgin Atlantic, andTAP AIR PORTUGAL 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.
SWISS
7.5
Good
1,654 reviews
Check prices

Overall

7.5

Crew

8.2

Entertainment

6.8

Boarding

7.6

Food

7.1

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Anonymous,Aug 2024

BLQ - ZRH

We had to wait more than an hour at check in because they said I requested an upgrade to business class (which I didn’t) and weren’t able to cancel it. They finally assigned us regular seats but I got stopped again at the gate because of the same issue. We barely made it on time. Poor management on the connecting flight (a 10 hour flight) where they let two young mothers sit together near us (they were sitting in separate areas when we boarded), who were talking endlessly, both with screaming babies, and no help from the crew to make them aware of other people around them.
SWISS
7.5
Good
1,654 reviews
SWISS
7.5
Good
1,654 reviews
Check prices

Overall

7.5

Crew

8.2

Entertainment

6.8

Boarding

7.6

Food

7.1

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Anonymous,Aug 2024

BLQ - ZRH

We had to wait more than an hour at check in because they said I requested an upgrade to business class (which I didn’t) and weren’t able to cancel it. They finally assigned us regular seats but I got stopped again at the gate because of the same issue. We barely made it on time. Poor management on the connecting flight (a 10 hour flight) where they let two young mothers sit together near us (they were sitting in separate areas when we boarded), who were talking endlessly, both with screaming babies, and no help from the crew to make them aware of other people around them.
Virgin Atlantic
7.4
Good
652 reviews
SWISS
7.5
Good
1,654 reviews
Check prices

Overall

7.5

Crew

8.2

Entertainment

6.8

Boarding

7.6

Food

7.1

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Anonymous,Aug 2024

BLQ - ZRH

We had to wait more than an hour at check in because they said I requested an upgrade to business class (which I didn’t) and weren’t able to cancel it. They finally assigned us regular seats but I got stopped again at the gate because of the same issue. We barely made it on time. Poor management on the connecting flight (a 10 hour flight) where they let two young mothers sit together near us (they were sitting in separate areas when we boarded), who were talking endlessly, both with screaming babies, and no help from the crew to make them aware of other people around them.
TAP AIR PORTUGAL
7.1
Good
1,908 reviews
SWISS
7.5
Good
1,654 reviews
Check prices

Overall

7.5

Crew

8.2

Entertainment

6.8

Boarding

7.6

Food

7.1

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Anonymous,Aug 2024

BLQ - ZRH

We had to wait more than an hour at check in because they said I requested an upgrade to business class (which I didn’t) and weren’t able to cancel it. They finally assigned us regular seats but I got stopped again at the gate because of the same issue. We barely made it on time. Poor management on the connecting flight (a 10 hour flight) where they let two young mothers sit together near us (they were sitting in separate areas when we boarded), who were talking endlessly, both with screaming babies, and no help from the crew to make them aware of other people around them.
Icelandair
7.0
Good
514 reviews
SWISS
7.5
Good
1,654 reviews
Check prices

Overall

7.5

Crew

8.2

Entertainment

6.8

Boarding

7.6

Food

7.1

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Anonymous,Aug 2024

BLQ - ZRH

We had to wait more than an hour at check in because they said I requested an upgrade to business class (which I didn’t) and weren’t able to cancel it. They finally assigned us regular seats but I got stopped again at the gate because of the same issue. We barely made it on time. Poor management on the connecting flight (a 10 hour flight) where they let two young mothers sit together near us (they were sitting in separate areas when we boarded), who were talking endlessly, both with screaming babies, and no help from the crew to make them aware of other people around them.

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 £481 on this airline. Additional options worth looking into are Icelandair and Virgin Atlantic, starting at £482 and £525 round-trip. TAP AIR PORTUGAL is 11% 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 London Gatwick Airport?

Book flights to London Gatwick Airport if you plan to visit one of these locations
Silver Spring
Hanover
Oxon Hill
Arlington
Woodbridge
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 4 July 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£368Average£526FlexibilityNo 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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