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

Prices are currently low for flights on this route. Typical prices usually range from £467 to £611. The lowest price recently found on this route was £388.

Question 1

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

Accepted Answer

You could potentially save up to 43% on your flight if you consider stops on a Washington, D.C. to London Heathrow Airport flight.

Question 2

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

Accepted Answer

As of December 2025, prices for Washington, D.C. to London Heathrow Airport flights are approximately 44% more expensive when compared to flights at the same time last year.

Question 3

How long does it take to fly to London Heathrow Airport?

Accepted Answer

If you’re flying from a popular airport in Washington, D.C., such as Baltimore or Washington, D.C., and flying into London Heathrow Airport, then you can expect flight times to average 7h 05m and 8h 10m, respectively.

Question 4

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

Accepted Answer

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

Question 5

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

Accepted Answer

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

Question 6

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

Accepted Answer

Prices are currently low for flights on this route.Typical prices usually range from £467 to £611.
The lowest price recently found on this route was £388.

Question 7

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

Accepted Answer

Historically, on average around 21% 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 159 minutes.

Question 8

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

Accepted Answer

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

Question 9

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

Accepted Answer

On average, the least expensive day to fly to London Heathrow Airport from Washington, D.C. is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as £525. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Thursday is £602.

Question 10

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

Accepted Answer

In general, August is the cheapest month to fly from Washington, D.C. to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £488. The month of September is another great option to travel to London Heathrow Airport, with average flight prices from Washington, D.C. averaging around £488.

Question 11

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

Accepted Answer

British Airways, United Airlines, and Austrian Airlines are the most popular carriers operating from Washington, D.C. to London Heathrow

Question 12

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

Accepted Answer

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from Washington, D.C. to London Heathrow Airport in the afternoon for as low as £556. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are £570 on average. Flights to London Heathrow Airport from Washington, D.C. in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

Question 13

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

Accepted Answer

147 flights are operational weekly from Washington, D.C. to London Heathrow Airport as of December 2025. The most popular departure day for this route is Tue, with 18% of flights per week taking off on this day.

Question 14

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

Accepted Answer

21 flights are operational daily from Washington, D.C. to London Heathrow Airport as of December 2025. The most popular departure time for this route is 22:00, with 100% of flights per day taking off in the evening.

Question 15

Which airlines fly to London Heathrow Airport?

Accepted Answer

British Airways, Virgin Atlantic and United Airlines are the top three most popular airlines that fly to London Heathrow Airport from Washington, D.C. according to our data. British Airways is the first choice among our users, with 49% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 8 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

Question 16

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

Accepted Answer

According to our data, Virgin Atlantic have had the fewest delays on this route over the last 12 months, with about 15% of their flights experiencing any sort of delay.

Question 17

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

Accepted Answer

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

Question 18

How far in advance should I book a flight to London Heathrow Airport?

Accepted Answer

You are more likely to see cheaper flights to London Heathrow Airport from Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £559 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Washington, D.C. for as low as £522 on momondo.

Question 19

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

Accepted Answer

Prices for flights from Washington, D.C. to London Heathrow Airport are refreshed on a daily basis.

Question 20

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

Accepted Answer

As of December 2025, there are 8 operators available to choose from for flights from Washington, D.C. to London Heathrow Airport.

Question 21

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

Accepted Answer

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. to London Heathrow Airport.

Question 22

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

Accepted Answer

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

Best price found	£333
Fastest flight time	7h 05m
Direct flights	Mon, Wed, Thu, Fri, Sat and Sun

Airline	Rating	Free Cancellation	Price
Lufthansa	PriceFrom £307	Free Cancellation	Rating 6.8 7,673 reviews	Search Lufthansa flights
Icelandair	PriceFrom £366	Free Cancellation	Rating 7.1 593 reviews	Search Icelandair flights
Virgin Atlantic	PriceFrom £380	Free Cancellation	Rating 7.5 678 reviews	Search Virgin Atlantic flights
British Airways	PriceFrom £384	Free Cancellation	Rating 6.7 7,631 reviews	Search British Airways flights
Air France	PriceFrom £395	Free Cancellation	Rating 7.4 1,514 reviews	Search Air France flights
Iberia	PriceFrom £455	Free Cancellation	Rating 7.0 3,058 reviews	Search Iberia flights
United Airlines	PriceFrom £499	Free Cancellation	Rating 7.4 9,124 reviews	Search United Airlines flights
American Airlines	PriceFrom £508	Free Cancellation	Rating 7.2 11,069 reviews	Search American Airlines flights

Cheap flights from Washington, D.C. to London from £185

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 19/1. 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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How to get the cheapest flight ticket from Washington, D.C. to London Heathrow Airport

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

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

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

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

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

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

How far in advance should I book a flight to London Heathrow Airport?

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

There are 4 cabin classes available to choose from on Washington, D.C. to London Heathrow 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 Heathrow Airport flights?

You could potentially save up to 43% on your flight if you consider stops on a Washington, D.C. to London Heathrow Airport flight.

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

As of December 2025, prices for Washington, D.C. to London Heathrow Airport flights are approximately 44% more expensive when compared to flights at the same time last year.

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

British Airways, United Airlines, and Austrian Airlines are the most popular carriers operating from Washington, D.C. to London Heathrow

Which airlines fly to London Heathrow Airport?

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

Historically, on average around 21% 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 159 minutes.

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

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing 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?

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

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

According to our data, Virgin Atlantic have had the fewest 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 Heathrow Airport on average per day?

21 flights are operational daily from Washington, D.C. to London Heathrow Airport as of December 2025. The most popular departure time for this route is 22:00, with 100% of flights per day taking off in the evening.

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

147 flights are operational weekly from Washington, D.C. to London Heathrow Airport as of December 2025. The most popular departure day for this route is Tue, with 18% of flights per week taking off on this day.

How long does it take to fly to London Heathrow Airport?

If you’re flying from a popular airport in Washington, D.C., such as Baltimore or Washington, D.C., and flying into London Heathrow Airport, then you can expect flight times to average 7h 05m and 8h 10m, respectively.

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

Cheap Washington, D.C. to London Heathrow Airport (WAS to LHR) flight deals and tips

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How far is Washington, D.C. to London Heathrow by plane?

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

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

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

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

What is the most popular plane model from Washington, D.C. to London Heathrow Airport?

What is the most popular airline from Washington, D.C. to London Heathrow Airport?

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

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