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 £286 on this airline. Icelandair is 42% cheaper than the average price of flights available within the next 90 days to this destination.

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.

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).

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport as you normally would.

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.

£374+ Cheap Flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Cheap flight deals from Gatwick to Dulles Intl

Enter your travel dates to find the best prices.

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Best

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One-way

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 31 October 2026.

Mon 9/1111:55 -

1 stop11h 35m

Thu 12/1119:40 -

1 stop10h 15m

Deal found 27/10£403

Mon 9/1111:55 -

1 stop11h 35m

Sun 22/1119:40 -

1 stop10h 15m

Deal found 29/10£405

Wed 11/1116:35 -

1 stop27h 40m

Wed 2/1222:30 -

1 stop11h 35m

Deal found 30/10£408

Mon 9/1111:55 -

1 stop11h 35m

Sun 15/1119:40 -

1 stop10h 15m

Deal found 30/10£409

Fri 6/1111:55 -

1 stop11h 35m

Sun 15/1119:40 -

1 stop10h 15m

Deal found 27/10£410

Mon 23/1116:35 -

1 stop27h 05m

Sun 6/1222:30 -

1 stop12h 15m

Deal found 29/10£411

Wed 18/1110:40 -

1 stop14h 50m

Wed 2/1222:30 -

1 stop11h 35m

Deal found 29/10£413

Thu 3/1216:00 -

1 stop33h 30m

Sun 6/1222:30 -

1 stop12h 15m

Deal found 30/10£413

Wed 4/1116:35 -

1 stop27h 40m

Wed 9/1222:30 -

1 stop11h 35m

Deal found 28/10£414

Wed 4/1111:55 -

1 stop11h 35m

Sat 14/1119:40 -

1 stop10h 15m

Deal found 27/10£416

Wed 4/1116:35 -

1 stop27h 40m

Tue 1/1217:25 -

1 stop11h 25m

Deal found 27/10£416

Wed 4/1116:35 -

1 stop27h 40m

Wed 11/1122:30 -

1 stop11h 35m

Deal found 27/10£417

Find flight deals from Gatwick to Dulles Intl

Round-trip from	£403
One-way from	£374
Popular in	July
Cheapest in	November
Average price	£549

Icelandair
9/11-12/11
2 total stops
21h 50m total
London to Washington, D.C.

Search Deals

12/11-31/12
1 total stop
28h 21m total
London to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 12% potential increase in price (£53 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£13 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 2026

Search Deals

Cheapflights Fare Finder

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

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Thu 10/12

16:00-20:30

1 stop33h 30m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£396

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Thu 24/12

10:35-21:11

1 stop15h 36m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£399

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Mon 8/3

11:00-14:40

2 stops32h 40m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£401

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Tue 6/4

21:15-20:35

2 stops28h 20m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£404

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Tue 22/12

21:20-15:15

2 stops46h 55m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£426

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Mon 16/11

11:55-18:30

1 stop11h 35m

Washington, D.C. Dulles Intl

Tue 15/12

19:40-10:55

1 stop10h 15m

£477

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Tue 10/11

21:20-15:15

2 stops46h 55m

Washington, D.C. Dulles Intl

Thu 10/12

17:25-09:50

1 stop11h 25m

£513

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Thu 31/12

10:35-21:11

1 stop15h 36m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£521

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Fri 25/12

10:40-21:00

1 stop15h 20m

Washington, D.C. Dulles Intl

Thu 28/1

17:25-09:50

1 stop11h 25m

£522

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Wed 2/12

09:35-15:15

2 stops34h 40m

Washington, D.C. Dulles Intl

Sun 6/12

22:30-20:35

2 stops17h 05m

£522

Flights are sorted by cheapest return flights first.

Deals found on 27/10

Showing 1-10 of 23 resultsSorted by cheapest first

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.

LGW-IAD

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’s the top stopover airport for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

Paris (CDG) – chosen by Cheapflights users on 50% of one-stop itineraries from London Gatwick Airport to Washington, D.C. Dulles Intl Airport on Cheapflights.

What’s the cheapest stopover airport for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

Casablanca (CMN) is the most affordable one-stop option, with an average return flight price of £548.

What’s the fastest stopover option from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

Flights via Reykjavik (KEF) have the shortest average one-way travel time for one-stop routes: 11h 35m.

Which airport typically offers the quickest stopover for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 1h 21m.

Reviews of airlines servicing Dulles Intl

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

6.9

Okay

764 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Victoria,Sept 2026

KEF - EWR

Icelandair was excellent. Kayak business not so much. As mentioned in our comment through pilot, there were hidden fees when we bought the tickets.

Icelandair

6.9

Okay

764 reviews

Icelandair

6.9

Okay

764 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Victoria,Sept 2026

KEF - EWR

Icelandair was excellent. Kayak business not so much. As mentioned in our comment through pilot, there were hidden fees when we bought the tickets.

Related info for your journey

How long is the flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?
For as low as £477, Icelandair 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 £286 on this airline. Icelandair is 42% 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.

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Top airline flying from Gatwick to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£286	Average£456	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights

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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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Cheap flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport from £374

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Gatwick to Dulles Intl

Cheapest flights from Gatwick to Dulles IntlExplore 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 31 October 2026.

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 31 October 2026.

Best flights from Gatwick to Dulles IntlDiscover carefully curated flight deals from Gatwick to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 31 October 2026.

Discover carefully curated flight deals from Gatwick to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 31 October 2026.

Last-minute flights from Gatwick to Dulles IntlDiscover last-minute flight deals from Gatwick to Dulles Intl. Data last updated 31 October 2026 and is based on user searches.

Discover last-minute flight deals from Gatwick to Dulles Intl. Data last updated 31 October 2026 and is based on user searches.

One-way flights from Gatwick to Dulles IntlSearch for one-way flight options from Gatwick to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 31 October 2026.

Search for one-way flight options from Gatwick to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 31 October 2026.

Find flight deals from Gatwick to Dulles Intl

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Cheapflights Fare Finder

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.

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.

Cheapflights Insights

What’s the top stopover airport for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

Paris (CDG) – chosen by Cheapflights users on 50% of one-stop itineraries from London Gatwick Airport to Washington, D.C. Dulles Intl Airport on Cheapflights.

What’s the cheapest stopover airport for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

Casablanca (CMN) is the most affordable one-stop option, with an average return flight price of £548.

What’s the fastest stopover option from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

Flights via Reykjavik (KEF) have the shortest average one-way travel time for one-stop routes: 11h 35m.

Which airport typically offers the quickest stopover for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 1h 21m.

Reviews of airlines servicing Dulles Intl

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.

Related info for your journey

How long is the flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

What is the cheapest airline to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport round-trip?

Can I find deals for flights from Gatwick to Dulles Intl that include hotel bookings?

How can I find direct flights from Gatwick to Dulles Intl?

Can I find deals for business class flights from Gatwick to Dulles Intl?

Travelling to a place near Washington, D.C. Dulles Intl Airport?

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Alternative routes for Gatwick to Dulles Intl

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Complete your trip

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Other flights to Dulles Intl

Explore flights to Dulles Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 31 October 2026.

Search flights from Gatwick to Dulles Intl by cabin class

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Gatwick and Dulles Intl flights

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Why should you use Cheapflights to find cheap flight tickets from Gatwick to Dulles Intl?

Can Cheapflights 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?

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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 31 October 2026.

Best flights from Gatwick to Dulles Intl
Discover carefully curated flight deals from Gatwick to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 31 October 2026.

Last-minute flights from Gatwick to Dulles Intl
Discover last-minute flight deals from Gatwick to Dulles Intl. Data last updated 31 October 2026 and is based on user searches.

One-way flights from Gatwick to Dulles Intl
Search for one-way flight options from Gatwick to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 31 October 2026.