What is the cheapest airline that flies from Washington, D.C. Dulles Intl to London Gatwick?

Icelandair is the most popular carrier operating from Washington, D.C. Dulles Intl to London Gatwick

Which layover airport offers the lowest fares from Washington, D.C. Dulles Intl Airport to London Gatwick Airport?

Flights via Lisbon (LIS) offer the lowest average round-trip price of $445.

Which airport is the most popular layover for flights between Washington, D.C. Dulles Intl Airport and London Gatwick Airport?

Reykjavik (KEF) was the most common stop: 80% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest travel time from Washington, D.C. Dulles Intl Airport to London Gatwick Airport?

Flights connecting via Reykjavik (KEF) have the shortest average one-way travel time: 10h 25m.

Which layover airport has the shortest connection time from Washington, D.C. Dulles Intl Airport to London Gatwick Airport?

Reykjavik (KEF) has the shortest average layover time for this route: 1h 38m.

How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport?

As of March 2026, there is 1 operator available to choose from for flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport.

What documentation or ID do you need to fly to London Gatwick Airport?

The travel and health documents you'll need for your trip to London Gatwick Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Gatwick Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$327 Cheap Flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport in 2026

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Washington, D.C. Dulles Intl Airport to London

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:30 pm - 2:40 pm

IAD

LGW

13h 10m

1 stop

3:40 pm - 7:20 pm

LGW

IAD

32h 40m

1 stop

$587Icelandair

Thu, Apr 16 - Tue, Apr 21

8:30 pm - 8:10 pm

IAD

LGW

18h 40m

2 stops

2:00 pm - 11:35 am

LGW

IAD

26h 35m

1 stop

$588Multiple Airlines

Mon, Apr 13 - Wed, Apr 22

8:30 pm - 2:40 pm

IAD

LGW

13h 10m

1 stop

3:40 pm - 7:20 pm

LGW

IAD

32h 40m

1 stop

$591Icelandair

Tue, Apr 14 - Tue, Apr 21

8:30 pm - 11:45 am

IAD

LGW

10h 15m

1 stop

3:40 pm - 7:20 pm

LGW

IAD

32h 40m

1 stop

$592Icelandair

Mon, Aug 17 - Mon, Aug 24

8:30 pm - 2:40 pm

IAD

LGW

13h 10m

1 stop

1:00 pm - 7:20 pm

LGW

IAD

11h 20m

1 stop

$593Icelandair

Tue, Apr 28 - Thu, May 7

8:30 pm - 2:40 pm

IAD

LGW

13h 10m

1 stop

3:40 pm - 7:20 pm

LGW

IAD

32h 40m

1 stop

$594Icelandair

Tue, Apr 28 - Mon, May 11

8:30 pm - 2:40 pm

IAD

LGW

13h 10m

1 stop

3:40 pm - 7:20 pm

LGW

IAD

32h 40m

1 stop

$595Icelandair

Tue, Sep 1 - Tue, Oct 6

8:30 pm - 8:10 pm

IAD

LGW

18h 40m

2 stops

9:20 am - 7:20 pm

LGW

IAD

15h 00m

2 stops

$596Multiple Airlines

Tue, Apr 21 - Tue, Apr 28

8:30 pm - 8:10 pm

IAD

LGW

18h 40m

2 stops

9:20 am - 7:20 pm

LGW

IAD

15h 00m

2 stops

$597Multiple Airlines

Tue, Apr 21 - Tue, Apr 28

10:35 pm - 3:35 pm

IAD

LGW

12h 00m

1 stop

9:15 pm - 3:10 pm

LGW

IAD

22h 55m

2 stops

$598TAP AIR PORTUGAL

Mon, Apr 20 - Mon, Apr 27

Icelandair flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport

Our best Icelandair deals on Washington, D.C. Dulles Intl Airport to London Gatwick Airport flight tickets

Icelandair

Aug 17

IAD8:30 pmWashington, D.C. Dulles Intl

10h 15m

1 stop

LGW11:45 amLondon Gatwick

Aug 24

LGW3:40 pmLondon Gatwick

32h 40m

1 stop

IAD7:20 pmWashington, D.C. Dulles Intl

$592

Icelandair

Apr 28

IAD8:30 pmWashington, D.C. Dulles Intl

13h 10m

1 stop

LGW2:40 pmLondon Gatwick

May 10

LGW3:40 pmLondon Gatwick

11h 35m

1 stop

IAD10:15 pmWashington, D.C. Dulles Intl

$593

Icelandair

Apr 28

IAD8:30 pmWashington, D.C. Dulles Intl

13h 10m

1 stop

LGW2:40 pmLondon Gatwick

May 11

LGW3:40 pmLondon Gatwick

32h 40m

1 stop

IAD7:20 pmWashington, D.C. Dulles Intl

$594

TAP AIR PORTUGAL flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport

Our best TAP AIR PORTUGAL deals on Washington, D.C. Dulles Intl Airport to London Gatwick Airport flight tickets

TAP AIR PORTUGAL

Apr 20

IAD10:35 pmWashington, D.C. Dulles Intl

12h 00m

1 stop

LGW3:35 pmLondon Gatwick

Apr 27

LGW9:15 pmLondon Gatwick

22h 55m

2 stops

IAD3:10 pmWashington, D.C. Dulles Intl

$598

TAP AIR PORTUGAL

Apr 23

IAD10:35 pmWashington, D.C. Dulles Intl

30h 10m

1 stop

LGW9:45 amLondon Gatwick

Apr 29

LGW4:25 pmLondon Gatwick

27h 45m

1 stop

IAD3:10 pmWashington, D.C. Dulles Intl

$615

TAP AIR PORTUGAL

Apr 30

IAD10:35 pmWashington, D.C. Dulles Intl

16h 50m

2 stops

LGW8:25 pmLondon Gatwick

May 11

LGW4:25 pmLondon Gatwick

27h 45m

1 stop

IAD3:10 pmWashington, D.C. Dulles Intl

$632

momondo Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 4/16

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Tue 4/21

3:40 pm-7:20 pm

1 stop32h 40m

$587

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 4/13

8:30 pm-8:10 pm

2 stops18h 40m

London Gatwick

Wed 4/22

2:00 pm-11:35 am

1 stop26h 35m

$588

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 4/14

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Tue 4/21

3:40 pm-7:20 pm

1 stop32h 40m

$591

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 8/17

8:30 pm-11:45 am

1 stop10h 15m

London Gatwick

Mon 8/24

3:40 pm-7:20 pm

1 stop32h 40m

$592

Quickest round-trip

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 4/28

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Thu 5/7

1:00 pm-7:20 pm

1 stop11h 20m

$593

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 4/28

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Mon 5/11

3:40 pm-7:20 pm

1 stop32h 40m

$594

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 9/1

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Tue 10/6

3:40 pm-7:20 pm

1 stop32h 40m

$595

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 4/21

8:30 pm-8:10 pm

2 stops18h 40m

London Gatwick

Tue 4/28

9:20 am-7:20 pm

2 stops15h 00m

$596

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 4/21

8:30 pm-8:10 pm

2 stops18h 40m

London Gatwick

Tue 4/28

9:20 am-7:20 pm

2 stops15h 00m

$597

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 4/20

10:35 pm-3:35 pm

1 stop12h 00m

London Gatwick

Mon 4/27

9:15 pm-3:10 pm

2 stops22h 55m

$598

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to London Gatwick Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

What is the cheapest month to fly to London Gatwick Airport?

In general, February is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to London Gatwick Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $426. If you are unable to visit London Gatwick Airport during the month of February, then departing from Washington, D.C. Dulles Intl Airport during the month November is also very affordable. Most momondo users find prices during this month for around $447.

When to book flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to London Gatwick Airport according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Washington, D.C. Dulles Intl Airport to London Gatwick Airport (IAD to LGW) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to London Gatwick Airport

Fastest flight time	10h 10m
Direct flights	None

The fastest flight from Washington, D.C. Dulles Intl Airport to London Gatwick Airport takes 10h 10m

There are no direct flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to London Gatwick Airport.

Search flight deals

How far is Washington, D.C. Dulles Intl to London Gatwick by plane?
The straight-line distance from Washington, D.C. Dulles Intl to London Gatwick is 3682.8 mi. By plane, this route typically takes 10h 10m.
When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport?
Prices for flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport?
As of March 2026, there is 1 operator available to choose from for flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport.
How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to London Gatwick Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to London Gatwick Airport.
What documentation or ID do you need to fly to London Gatwick Airport?
The travel and health documents you'll need for your trip to London Gatwick Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Gatwick Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Washington, D.C. Dulles Intl Airport to London Gatwick Airport?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Washington, D.C. Dulles Intl Airport to London Gatwick Airport is Icelandair (100% of total bookings).

Best airlines flying from Washington, D.C. Dulles Intl Airport to London Gatwick Airport

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to London Gatwick Airport with momondo

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom $505	Free Cancellation	Rating 7.1 619 reviews		Search Icelandair flights

Gatwick

Hounslow

Milton Keynes

Luton

Dover

Slough

Crawley

Hayes

Wembley

Dartford

Croydon

Brentwood

Harrow

Watford

Guildford

Stansted

Cobham

Folkestone

Romford

Richmond

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to London?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington, D.C. to London. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Washington, D.C. to London with flexible booking policies on momondo?

All flight searches from Washington, D.C. to London on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Washington, D.C. to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington, D.C. to London.

I’m not ready to book a flight from Washington, D.C. to London right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Washington, D.C. to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your London Gatwick Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Thu 4/9

Thu 4/16

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to London

Popular cities

Other flights from Washington, D.C. Dulles Intl Airport

Other flights to London

Airlines

Cabin classes

Complete your trip

Feeling lucky

Popular cities in the United Kingdom

Flights to London Heathrow Airportfrom $388

Flights to London City Airportfrom $591

Flights to London Stansted Airportfrom $337

Flights to London Luton Airportfrom $390

Flights to Glasgow Intl Airportfrom $440

Flights to Belfast Intl Airportfrom $608

Flights to London Southend Airportfrom $641

Flights to Belfast City Airportfrom $603

Cheap flights from Washington, D.C. Dulles Intl Airport to London from $330

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Washington, D.C. Dulles Intl Airport to London

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Icelandair flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport

Our best Icelandair deals on Washington, D.C. Dulles Intl Airport to London Gatwick Airport flight tickets

TAP AIR PORTUGAL flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport

Our best TAP AIR PORTUGAL deals on Washington, D.C. Dulles Intl Airport to London Gatwick Airport flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport that are best for you.

See travel insights to London from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to London Gatwick Airport

What is the cheapest month to fly to London Gatwick Airport?

What is the cheapest airline that flies from Washington, D.C. Dulles Intl to London Gatwick?

Which airport is the most popular layover for flights between Washington, D.C. Dulles Intl Airport and London Gatwick Airport?

Which layover airport offers the lowest fares from Washington, D.C. Dulles Intl Airport to London Gatwick Airport?

Which layover airport has the shortest travel time from Washington, D.C. Dulles Intl Airport to London Gatwick Airport?

Which layover airport has the shortest connection time from Washington, D.C. Dulles Intl Airport to London Gatwick Airport?

When to book flights from Washington, D.C. Dulles Intl Airport to London Gatwick Airport

Cheap Washington, D.C. Dulles Intl Airport to London Gatwick Airport (IAD to LGW) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to London Gatwick Airport

Fastest flight time

Direct flights

Best airlines flying from Washington, D.C. Dulles Intl Airport to London Gatwick Airport

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to London Gatwick Airport with momondo

Traveling to a place near London?

Why use momondo?

An easier way to manage your London Gatwick Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to London

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo

Washington, D.C. Dulles Intl Airport flight routes

According to popular flight searches on momondo this year

London Gatwick Airport flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to London

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to London

List of cabin classes available on flights landing in London. Availability may vary depending on flight origin and airline.

Complete your trip to London

Explore popular destinations other users love

According to popular flight searches on momondo this year