What is the most punctual flight time for Washington, D.C. to London flights?

Generally, flights departing at night tend to experience fewer delays. Flights in the morning have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Wednesday has historically seen more delays on average compared to the rest of the week.

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

New York (JFK) has the shortest average layover time for this route: 1h 18m.

What airlines fly to London?

British Airways, United Airlines and American Airlines are the top three most popular airlines that fly to London from Washington, D.C. according to our data. British Airways is the first choice among our users, with 52% of people opting to fly with this airline when traveling to London. Keep in mind that there are 18 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

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

Icelandair, JetBlue, and British Airways are the most popular carriers operating from Washington, D.C. to London

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

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 9h 42m.

Which airline has the best punctuality record on Washington, D.C. to London flights?

According to our data, Virgin Atlantic have had the least number of delays on this route over the last 12 months; with about 14% of their flights experiencing any sort of delay.

How often are flights from Washington, D.C. to London delayed?

Historically, on average around 18% of flights between Washington, D.C. and London have experienced a delay on any given week. The average delay length over the past 12 months has been 180 minutes.

How long does it take to fly to London?

If you’re flying from a popular airport in Washington, D.C., such as Baltimore or Washington, D.C., and flying into London, then you can expect flight times to average 7h 05m and 8h 12m, respectively.

How many flights depart from Washington, D.C. to London on average per week?

As of July 2026, there are 244 flights per week flying from Washington, D.C. to London. The most common day of the week flights depart is Fri, with 17% of flights taking off on this day.

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

Reykjavik (KEF) was the most common stop: 46% of momondo users choosing 1-stop flights on this route connected there.

How many flights depart from Washington, D.C. to London on average per day?

34 flights are operational daily from Washington, D.C. to London as of July 2026. The most popular departure time for this route is 10:00PM, with 85% of flights per day taking off in the evening.

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

Flights via Lisbon (LIS) offer the lowest average round-trip price of $385.

When did momondo last update prices for flights from Washington, D.C. to London?

Prices for flights from Washington, D.C. to London were last updated today.

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

As of July 2026, there are 18 operators available to choose from for flights from Washington, D.C. to London.

How old do you have to be to fly from Washington, D.C. to London?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. to London.

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

The travel and health documents you'll need for your trip to London 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. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$213 Cheap Flights from Washington, D.C. to London in 2026

Discover deals from 900+ travel sites with momondo.

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

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:35 pm - 9:00 pm

IAD

STN

17h 25m

2 stops

5:20 pm - 8:35 pm

STN

IAD

32h 15m

2 stops

$620Multiple Airlines

Tue, Sep 22 - Mon, Sep 28

11:30 pm - 6:55 pm

IAD

LHR

15h 25m

1 stop

8:15 am - 8:35 pm

LHR

IAD

17h 20m

1 stop

$620TAP AIR PORTUGAL

Wed, Oct 28 - Fri, Dec 4

8:20 pm - 4:25 pm

IAD

LHR

15h 05m

2 stops

6:40 am - 5:00 pm

LHR

IAD

15h 20m

2 stops

$621Scandinavian Airlines

Sat, Sep 19 - Mon, Sep 21

8:20 pm - 8:55 am

IAD

LHR

31h 35m

2 stops

6:40 am - 5:00 pm

LHR

IAD

15h 20m

1 stop

$627Scandinavian Airlines

Sun, Sep 6 - Wed, Sep 9

11:20 pm - 2:40 pm

BWI

LGW

10h 20m

1 stop

11:55 am - 6:40 pm

LGW

BWI

11h 45m

1 stop

$640Icelandair

Thu, Oct 22 - Fri, Dec 4

8:30 pm - 8:20 pm

BWI

LHR

18h 50m

1 stop

8:35 pm - 6:40 pm

LHR

BWI

27h 05m

1 stop

$644Icelandair

Thu, Sep 10 - Sun, Jan 10

5:00 pm - 9:35 am

DCA

LGW

11h 35m

1 stop

12:20 pm - 7:09 pm

LGW

DCA

11h 49m

1 stop

$748JetBlue

Sun, Aug 16 - Tue, Sep 1

2:25 pm - 9:35 am

DCA

LGW

14h 10m

1 stop

12:20 pm - 7:09 pm

LGW

DCA

11h 49m

1 stop

$754JetBlue

Thu, Sep 3 - Sat, Sep 5

6:00 pm - 5:40 pm

IAD

LCY

18h 40m

1 stop

9:50 am - 8:05 pm

LCY

IAD

39h 15m

2 stops

$824Lufthansa

Tue, Nov 10 - Thu, Nov 12

6:00 pm - 5:40 pm

IAD

LCY

18h 40m

1 stop

9:50 am - 8:05 pm

LCY

IAD

15h 15m

2 stops

$829Lufthansa

Tue, Nov 3 - Thu, Nov 5

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TAP AIR PORTUGAL flights from Washington, D.C. to London

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

TAP AIR PORTUGAL

Oct 28

IAD11:30 pmWashington, D.C. Dulles Intl

15h 25m

1 stop

LHR6:55 pmLondon Heathrow

Dec 4

LHR8:15 amLondon Heathrow

17h 20m

1 stop

IAD8:35 pmWashington, D.C. Dulles Intl

$620

TAP AIR PORTUGAL

Oct 28

IAD11:30 pmWashington, D.C. Dulles Intl

15h 25m

1 stop

LHR6:55 pmLondon Heathrow

Dec 1

LHR6:00 amLondon Heathrow

13h 45m

1 stop

IAD2:45 pmWashington, D.C. Dulles Intl

$632

TAP AIR PORTUGAL

Aug 4

IAD10:35 pmWashington, D.C. Dulles Intl

12h 00m

1 stop

LGW3:35 pmLondon Gatwick

Sep 1

LGW4:25 pmLondon Gatwick

27h 45m

1 stop

IAD3:10 pmWashington, D.C. Dulles Intl

$726

Scandinavian Airlines flights from Washington, D.C. to London

Our best Scandinavian Airlines deals on Washington, D.C. to London flight tickets

Scandinavian Airlines

Sep 19

IAD8:20 pmWashington, D.C. Dulles Intl

15h 05m

2 stops

LHR4:25 pmLondon Heathrow

Sep 21

LHR6:40 amLondon Heathrow

15h 20m

2 stops

IAD5:00 pmWashington, D.C. Dulles Intl

$621

Scandinavian Airlines

Sep 6

IAD8:20 pmWashington, D.C. Dulles Intl

31h 35m

2 stops

LHR8:55 amLondon Heathrow

Sep 9

LHR6:40 amLondon Heathrow

15h 20m

1 stop

IAD5:00 pmWashington, D.C. Dulles Intl

$627

Scandinavian Airlines

Sep 21

IAD8:20 pmWashington, D.C. Dulles Intl

31h 35m

2 stops

LHR8:55 amLondon Heathrow

Sep 24

LHR6:40 amLondon Heathrow

15h 20m

1 stop

IAD5:00 pmWashington, D.C. Dulles Intl

$628

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Tue 9/22

10:35 pm-9:00 pm

2 stops17h 25m

London Stansted

Mon 9/28

5:20 pm-8:35 pm

2 stops32h 15m

$620

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 10/28

11:30 pm-6:55 pm

1 stop15h 25m

London Heathrow

Fri 12/4

8:15 am-8:35 pm

1 stop17h 20m

$620

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sat 9/19

8:20 pm-4:25 pm

2 stops15h 05m

London Heathrow

Mon 9/21

6:40 am-5:00 pm

2 stops15h 20m

$621

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 9/6

8:20 pm-8:55 am

2 stops31h 35m

London Heathrow

Wed 9/9

6:40 am-5:00 pm

1 stop15h 20m

$627

Quickest round-trip

BaltimoreLondon

BWI - LGW

BWILGW

Baltimore/Washington

Thu 10/22

11:20 pm-2:40 pm

1 stop10h 20m

London Gatwick

Fri 12/4

11:55 am-6:40 pm

1 stop11h 45m

$640

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Thu 9/10

8:30 pm-8:20 pm

1 stop18h 50m

London Heathrow

Sun 1/10

8:35 pm-6:40 pm

1 stop27h 05m

$644

Washington, D.C.London

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Sun 8/16

5:00 pm-9:35 am

1 stop11h 35m

London Gatwick

Tue 9/1

12:20 pm-7:09 pm

1 stop11h 49m

$748

Washington, D.C.London

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Thu 9/3

2:25 pm-9:35 am

1 stop14h 10m

London Gatwick

Sat 9/5

12:20 pm-7:09 pm

1 stop11h 49m

$754

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Tue 11/10

6:00 pm-5:40 pm

1 stop18h 40m

London City

Thu 11/12

9:50 am-8:05 pm

2 stops39h 15m

$824

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Tue 11/3

6:00 pm-5:40 pm

1 stop18h 40m

London City

Thu 11/5

9:50 am-8:05 pm

2 stops15h 15m

$829

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. to London

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

Delays

Layovers

Other information

What is the typical price of a round-trip flight between Washington, D.C. and London?

Prices are currently low for flights on this route.

Typical prices usually range from $663 to $977.
The lowest price recently found on this route was $620.

What is the cheapest month to fly to London?

The cheapest month to fly to London from Washington, D.C. is in February. Flight prices, which tend to average around $664, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from Washington, D.C. averaging around $690.

What is the cheapest day to depart on your flight to London?

The cheapest day to depart from Washington, D.C. to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $857. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $962. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

What is the cheapest time of day to depart on your flight to London?

Flying to London from Washington, D.C. in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $867 when looking at flights departing in the afternoon. Flights to London are more costly in the evening, with an average ticket price of $933. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Washington, D.C. to London flight route?

Fly from Washington, D.C. Dulles Intl to London Heathrow for the best Washington, D.C. - London flight prices

How far in advance should I book a flight from Washington, D.C. to London?

You are more likely to see cheaper flights to London from Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $855 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Washington, D.C. for as low as $780 on momondo.

What cabin class options are available on Washington, D.C. to London flights?

There are 4 cabin classes available to choose from on Washington, D.C. to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Washington, D.C. to London flights?

No. A direct flight is the cheapest option for a flight between Washington, D.C. to London.

How have Washington, D.C. to London flight prices changed over time?

As of July 2026, prices for Washington, D.C. to London flights are approximately 6% more expensive when compared to flights at the same time last year.

When to book flights from Washington, D.C. to London

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

Estimated round-trip price

Cheap Washington, D.C. to London (WAS to LON) flight deals and tips

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

Best Price Found	$377
Fastest flight time	7h 05m
Direct flights	Every day
Airports in London	6 airports

The best one-way flight to London from Washington, D.C. in the past 72 hours is $377. The best round-trip flight deal from Washington, D.C. to London found on momondo in the last 72 hours is $804.

The fastest flight from Washington, D.C. to London takes 7h 05m

Direct flights go from Washington, D.C. to London every day.

There are 6 airports in London. From Washington, D.C. there are direct flights to London Heathrow (LHR).

Search flight deals

Frequently asked questions about flying from Washington, D.C. to London

How far is Washington, D.C. to London by plane?
Washington, D.C. and London are 3662.3 mi apart from one another. A reasonable flight in good conditions will take 7h 05m.
When did momondo last update prices for flights from Washington, D.C. to London?
Prices for flights from Washington, D.C. to London were last updated today.
How many operators does momondo search for flights from Washington, D.C. to London?
As of July 2026, there are 18 operators available to choose from for flights from Washington, D.C. to London.
How old do you have to be to fly from Washington, D.C. to London?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. to London.
What documentation or ID do you need to fly to London?
The travel and health documents you'll need for your trip to London 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. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Washington, D.C. to London?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Washington, D.C. to London is Boeing 777 (55.92% of total bookings). The next most popular plane models are Boeing 777-300ER (14.41%), Boeing 787-9 Dreamliner (8.76%), and Boeing 777-300 (4.34%).
What is the most popular airline from Washington, D.C. to London?
momondo data reveals that the most frequently booked airline on the route from Washington, D.C. to London is British Airways, representing 32% of all bookings. The subsequent popular airlines are United Airlines at 17%, Icelandair at 12%, and American Airlines at 9%.

Best airlines flying from Washington, D.C. to London

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

Airline	Rating	Free Cancellation	Price
TAP AIR PORTUGAL	PriceFrom $309	Free Cancellation	Rating 7.2 2,347 reviews	Search TAP AIR PORTUGAL flights
Virgin Atlantic	PriceFrom $382	Free Cancellation	Rating 7.5 695 reviews	Search Virgin Atlantic flights
United Airlines	PriceFrom $462	Free Cancellation	Rating 7.4 10,042 reviews	Search United Airlines flights
Icelandair	PriceFrom $465	Free Cancellation	Rating 7.0 716 reviews	Search Icelandair flights
American Airlines	PriceFrom $497	Free Cancellation	Rating 7.1 11,842 reviews	Search American Airlines flights
British Airways	PriceFrom $529	Free Cancellation	Rating 6.7 8,132 reviews	Search British Airways flights
Delta	PriceFrom $530	Free Cancellation	Rating 7.8 8,483 reviews	Search Delta flights
Scandinavian Airlines	PriceFrom $560	Free Cancellation	Rating 7.4 1,904 reviews	Search Scandinavian Airlines flights
Air Canada	PriceFrom $577	Free Cancellation	Rating 7.1 11,392 reviews	Search Air Canada flights
Air France	PriceFrom $581	Free Cancellation	Rating 7.5 1,627 reviews	Search Air France flights

Delta Flights From Washington, D.C. to London
The lowest priced Delta flight from Washington, D.C. to London from the last 72 hours was $530. Generally, Delta has 8 flights on this route every week with an average price of $927. Delta is rated 7.8/10 by our users.
KLM Flights From Washington, D.C. to London
KLM (7.8/10 from 1,550 reviews) operates around 8 flights from Washington, D.C. to London in any given week. The average KLM airfare for this route is around $1,031, with deals from around $618 rare but found on momondo. Referenced prices are for round-trip Washington, D.C. to London flight searches in the last 72 hours.

Hounslow

Gatwick

Milton Keynes

Luton

Hayes

Dover

Crawley

Wembley

Croydon

Stansted

Kingston upon Thames

Watford

Slough

Harrow

Brentwood

Cobham

Romford

Uxbridge

Guildford

Worthing

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Washington, D.C..

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

momondo does allow users to show only those flights to London from Washington, D.C. which offer a flexible booking policy as well as other useful filters and features.

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

momondo helps you find the best flight between Washington, D.C. and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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 offers price alerts on flights to London from Washington, D.C.. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your London trip

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Cheap flights from Washington, D.C. to London from $213

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to London departing on 10/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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TAP AIR PORTUGAL flights from Washington, D.C. to London

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

Scandinavian Airlines flights from Washington, D.C. to London

Our best Scandinavian Airlines deals on Washington, D.C. to London flight tickets

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See travel insights to London from

How to get the cheapest flight ticket from Washington, D.C. to London

What is the typical price of a round-trip flight between Washington, D.C. and London?

What is the cheapest month to fly to London?

What is the cheapest day to depart on your flight to London?

What is the cheapest time of day to depart on your flight to London?

What is the cheapest Washington, D.C. to London flight route?

How far in advance should I book a flight from Washington, D.C. to London?

What cabin class options are available on Washington, D.C. to London flights?

Can stopping save me money on Washington, D.C. to London flights?

How have Washington, D.C. to London flight prices changed over time?

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

What airlines fly to London?

How often are flights from Washington, D.C. to London delayed?

What is the most punctual flight time for Washington, D.C. to London flights?

What day of the week experiences the fewest flight delays on this route?

Which airline has the best punctuality record on Washington, D.C. to London flights?

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

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

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

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

How many flights depart from Washington, D.C. to London on average per day?

How many flights depart from Washington, D.C. to London on average per week?

How long does it take to fly to London?

When to book flights from Washington, D.C. to London

Cheap Washington, D.C. to London (WAS to LON) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Airports in London

Frequently asked questions about flying from Washington, D.C. to London

Best airlines flying from Washington, D.C. to London

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

Traveling to a place near London?

Why use momondo?

An easier way to manage your London 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 the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London

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.

Popular cities in the United Kingdom

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

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