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 55% 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.

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

Flights connecting via New York (JFK) have the shortest average one-way travel time: 9h 34m.

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

Historically, on average around 20% 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 168 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 20m and 8h 13m, respectively.

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

According to our data, British Airways have had the least number of delays on this route over the last 12 months; with about 15% of their flights experiencing any sort of delay.

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

As of April 2026, there are 218 flights per week flying from Washington, D.C. to London. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.

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 evening have, in the past, seen delays more frequently in comparison.

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

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

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 $445.

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

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

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

31 flights are operational daily from Washington, D.C. to London as of April 2026. The most popular departure time for this route is 10:00PM, with 83% of flights per day taking off in the evening.

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.

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.

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 April 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.

$303 Cheap Flights from Washington, D.C. to London in 2026

Q: 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 $981 to $697. The lowest price recently found on this route was $703.

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

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8:30 pm - 12:50 am

IAD

STN

23h 20m

2 stops

10:00 pm - 8:29 pm

STN

IAD

27h 29m

2 stops

$703Multiple Airlines

Mon, May 4 - Mon, May 11

8:30 pm - 11:55 am

BWI

LHR

10h 25m

1 stop

1:05 pm - 10:15 pm

LHR

BWI

14h 10m

1 stop

$704Icelandair

Sun, May 10 - Tue, May 19

8:30 pm - 11:20 pm

IAD

STN

21h 50m

2 stops

4:25 pm - 3:10 pm

STN

IAD

27h 45m

2 stops

$705Multiple Airlines

Sun, May 10 - Wed, Jun 3

6:59 am - 7:30 pm

DCA

STN

31h 31m

3 stops

10:45 pm - 10:31 pm

STN

DCA

28h 46m

3 stops

$705Multiple Airlines

Wed, Jun 10 - Wed, Jun 17

5:40 pm - 8:50 am

IAD

LCY

10h 10m

1 stop

10:00 am - 3:35 pm

LCY

IAD

10h 35m

1 stop

$824Virgin Atlantic

Sun, May 10 - Tue, May 19

4:20 pm - 10:00 am

DCA

LHR

12h 40m

1 stop

9:30 am - 3:39 pm

LHR

DCA

11h 09m

1 stop

$834Air Canada

Sun, May 10 - Tue, May 19

6:09 am - 2:35 pm

DCA

LHR

27h 26m

2 stops

10:20 am - 11:24 pm

LHR

DCA

18h 04m

2 stops

$835Scandinavian Airlines

Fri, May 8 - Sun, May 10

2:54 pm - 10:15 am

DCA

LHR

14h 21m

1 stop

7:25 pm - 7:49 am

LHR

DCA

17h 24m

1 stop

$837British Airways

Tue, Sep 29 - Tue, Oct 6

4:20 pm - 10:00 am

DCA

LHR

12h 40m

1 stop

9:30 am - 3:39 pm

LHR

DCA

11h 09m

1 stop

$842Air Canada

Sun, May 10 - Tue, May 19

6:05 am - 9:35 am

DCA

LHR

22h 30m

2 stops

7:05 am - 11:04 pm

LHR

DCA

20h 59m

2 stops

$851Scandinavian Airlines

Thu, Oct 15 - Tue, Oct 20

Icelandair flights from Washington, D.C. to London

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

Icelandair

May 10

BWI8:30 pmBaltimore/Washington

10h 25m

1 stop

LHR11:55 amLondon Heathrow

May 19

LHR1:05 pmLondon Heathrow

14h 10m

1 stop

BWI10:15 pmBaltimore/Washington

$704

Icelandair

Sep 23

IAD8:30 pmWashington, D.C. Dulles Intl

10h 25m

1 stop

LHR11:55 amLondon Heathrow

Oct 3

LHR1:05 pmLondon Heathrow

11h 15m

1 stop

IAD7:20 pmWashington, D.C. Dulles Intl

$718

Icelandair

May 4

IAD8:30 pmWashington, D.C. Dulles Intl

10h 15m

1 stop

LGW11:45 amLondon Gatwick

May 12

LGW1:00 pmLondon Gatwick

11h 20m

1 stop

IAD7:20 pmWashington, D.C. Dulles Intl

$721

Air Canada flights from Washington, D.C. to London

Our best Air Canada deals on Washington, D.C. to London flight tickets

Air Canada

May 10

DCA4:20 pmWashington, D.C. Reagan-National

12h 40m

1 stop

LHR10:00 amLondon Heathrow

May 19

LHR9:30 amLondon Heathrow

11h 09m

1 stop

DCA3:39 pmWashington, D.C. Reagan-National

$834

Air Canada

May 10

DCA4:20 pmWashington, D.C. Reagan-National

12h 40m

1 stop

LHR10:00 amLondon Heathrow

May 19

LHR9:30 amLondon Heathrow

11h 09m

1 stop

DCA3:39 pmWashington, D.C. Reagan-National

$842

Air Canada

May 10

DCA4:20 pmWashington, D.C. Reagan-National

12h 40m

1 stop

LHR10:00 amLondon Heathrow

May 19

LHR9:30 amLondon Heathrow

11h 09m

1 stop

DCA3:39 pmWashington, D.C. Reagan-National

$848

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Mon 5/4

8:30 pm-12:50 am

2 stops23h 20m

London Stansted

Mon 5/11

10:00 pm-8:29 pm

2 stops27h 29m

$703

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Sun 5/10

8:30 pm-11:55 am

1 stop10h 25m

London Heathrow

Tue 5/19

1:05 pm-10:15 pm

1 stop14h 10m

$704

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Sun 5/10

8:30 pm-11:20 pm

2 stops21h 50m

London Stansted

Wed 6/3

4:25 pm-3:10 pm

2 stops27h 45m

$705

Washington, D.C.London

DCA - STN

DCASTN

Washington, D.C. Reagan-National

Wed 6/10

6:59 am-7:30 pm

3 stops31h 31m

London Stansted

Wed 6/17

10:45 pm-10:31 pm

3 stops28h 46m

$705

Quickest round-trip

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Sun 5/10

5:40 pm-8:50 am

1 stop10h 10m

London City

Tue 5/19

10:00 am-3:35 pm

1 stop10h 35m

$824

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 5/10

4:20 pm-10:00 am

1 stop12h 40m

London Heathrow

Tue 5/19

9:30 am-3:39 pm

1 stop11h 09m

$834

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Fri 5/8

6:09 am-2:35 pm

2 stops27h 26m

London Heathrow

Sun 5/10

10:20 am-11:24 pm

2 stops18h 04m

$835

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 9/29

2:54 pm-10:15 am

1 stop14h 21m

London Heathrow

Tue 10/6

7:25 pm-7:49 am

1 stop17h 24m

$837

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 5/10

4:20 pm-10:00 am

1 stop12h 40m

London Heathrow

Tue 5/19

9:30 am-3:39 pm

1 stop11h 09m

$842

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Thu 10/15

6:05 am-9:35 am

2 stops22h 30m

London Heathrow

Tue 10/20

7:05 am-11:04 pm

2 stops20h 59m

$851

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?

What is the cheapest month to fly to London?

The cheapest month to fly to London from Washington, D.C. is in October. Flight prices, which tend to average around $616, are often lower during this time because this is during the off-season. The month of August is another great option to travel to London, with average flight prices from Washington, D.C. averaging around $643.

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 $773. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $900. 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 $820 when looking at flights departing in the afternoon. Flights to London are more costly in the evening, with an average ticket price of $856. 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 Baltimore/Washington 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 $786 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 $732 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?

You could potentially save up to 40% on your flight if you consider stops on a Washington, D.C. to London flight.

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

As of April 2026, prices for Washington, D.C. to London flights are approximately 64% 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	$500
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 $500. The best round-trip flight deal from Washington, D.C. to London found on momondo in the last 72 hours is $941.

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 April 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 (50.81% of total bookings). The next most popular plane models are Boeing 787-9 Dreamliner (13.54%), Boeing 777-300ER (11.58%), and Airbus A350-1000 (5.53%).
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 10%, 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 7.1 2,223 reviews	Search TAP AIR PORTUGAL flights
Icelandair	PriceFrom $398	Free Cancellation	Rating 7.0 644 reviews	Search Icelandair flights
Scandinavian Airlines	PriceFrom $454	Free Cancellation	Rating 7.4 1,761 reviews	Search Scandinavian Airlines flights
United Airlines	PriceFrom $462	Free Cancellation	Rating 7.4 9,672 reviews	Search United Airlines flights
Virgin Atlantic	PriceFrom $471	Free Cancellation	Rating 7.4 688 reviews	Search Virgin Atlantic flights
American Airlines	PriceFrom $497	Free Cancellation	Rating 7.1 11,671 reviews	Search American Airlines flights
British Airways	PriceFrom $529	Free Cancellation	Rating 6.7 7,927 reviews	Search British Airways flights
Delta	PriceFrom $530	Free Cancellation	Rating 7.9 8,464 reviews	Search Delta flights
Aer Lingus	PriceFrom $561	Free Cancellation	Rating 7.3 1,535 reviews	Search Aer Lingus flights
Iberia	PriceFrom $565	Free Cancellation	Rating 7.0 3,202 reviews	Search Iberia 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 7 flights on this route every week with an average price of $852. Delta is rated 7.9/10 by our users.
KLM Flights From Washington, D.C. to London
KLM (7.8/10 from 1,508 reviews) operates around 7 flights from Washington, D.C. to London in any given week. The average KLM airfare for this route is around $830, 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

Dover

Luton

Hayes

Crawley

Slough

Wembley

Stansted

Watford

Croydon

Uxbridge

Brentwood

Dartford

Cobham

Folkestone

Romford

Harrow

Guildford

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.

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Cheap flights from Washington, D.C. to London from $303

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 7/12. 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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Icelandair flights from Washington, D.C. to London

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

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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

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

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

Delta Flights From Washington, D.C. to London

KLM Flights From Washington, D.C. to London

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Why use momondo?

An easier way to manage your London trip

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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.

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