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 $619 to $778. The lowest price recently found on this route was $522.

Question 1

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

Accepted Answer

As of February 2026, prices for Washington, D.C. to London Heathrow Airport flights are approximately 31% more expensive when compared to flights at the same time last year.

Question 2

What airlines fly to London Heathrow Airport?

Accepted Answer

British Airways, United Airlines and Iberia 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 54% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 17 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

Question 3

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

Accepted Answer

Reykjavik (KEF) was the most common stop: 34% of momondo users choosing 1-stop flights on this route connected there.

Question 4

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

Accepted Answer

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $757. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $886.

Question 5

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

Accepted Answer

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

Question 6

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 $808. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive with an average ticket price of $813.

Question 7

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

Accepted Answer

As of February 2026, there are 204 flights per week flying from Washington, D.C. to London Heathrow Airport. The most common day of the week flights depart is Fri, with 17% of flights taking off on this day.

Question 8

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 $619 to $778.
The lowest price recently found on this route was $522.

Question 9

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 least number of delays on this route over the last 12 months; with about 15% of their flights experiencing any sort of delay.

Question 10

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 $754 when searching weeks out. 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 $706 on momondo.

Question 11

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

Accepted Answer

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

Question 12

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

Accepted Answer

Flights via Lisbon (LIS) offer the lowest average round-trip price of $449.

Question 13

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

Accepted Answer

JetBlue, TAP AIR PORTUGAL, and Scandinavian Airlines are the most popular carriers operating from Washington, D.C. to London Heathrow

Question 14

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

Accepted Answer

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

Question 15

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

Accepted Answer

Flights connecting via Montreal (YUL) have the shortest average one-way travel time: 9h 20m.

Question 16

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

Accepted Answer

The month of August is, on average, the cheapest month to fly to London Heathrow Airport from Washington, D.C., with most prices found around $658. If you’re not able to fly to London Heathrow Airport in August, then September is your next best option. Flight prices from Washington, D.C. to London Heathrow Airport during September average around $659.

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

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

Accepted Answer

You could potentially save up to 9% on your flight if you consider stops on a Washington, D.C. to London Heathrow Airport flight.

Question 19

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

Accepted Answer

Zurich (ZRH) has the shortest average layover time for this route: 1h 13m.

Question 20

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

Accepted Answer

On average, it takes 7h 05m to fly from Washington, D.C. to London Heathrow Airport if you fly out of Baltimore (the most popular airport in Washington, D.C.) and into London Heathrow Airport (the most popular airport in London Heathrow Airport). If you’re flying out of Washington, D.C. and into London Heathrow Airport, then the flight time is around 8h 20m.

Question 21

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 162 minutes.

Question 22

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

Accepted Answer

29 flights are operational daily from Washington, D.C. to London Heathrow Airport as of February 2026. The most popular departure time for this route is 6:00PM, with 100% of flights per day taking off in the evening.

Question 23

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 were last updated today.

Question 24

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

Accepted Answer

As of February 2026, there are 17 operators available to choose from for flights from Washington, D.C. to London Heathrow Airport.

Question 25

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

Accepted Answer

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. to London Heathrow Airport.

Question 26

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

Accepted Answer

The required travel and health documents for your London Heathrow Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Heathrow Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best Price Found	$374
Fastest flight time	7h 05m
Direct flights	Every day

Airline	Rating	Free Cancellation	Price
JetBlue	PriceFrom $31	Free Cancellation	Rating 7.2 2,892 reviews	Search JetBlue flights
TAP AIR PORTUGAL	PriceFrom $411	Free Cancellation	Rating 7.1 2,132 reviews	Search TAP AIR PORTUGAL flights
Icelandair	PriceFrom $417	Free Cancellation	Rating 7.1 606 reviews	Search Icelandair flights
Air France	PriceFrom $442	Free Cancellation	Rating 7.4 1,531 reviews	Search Air France flights
Lufthansa	PriceFrom $447	Free Cancellation	Rating 6.8 7,758 reviews	Search Lufthansa flights
Scandinavian Airlines	PriceFrom $454	Free Cancellation	Rating 7.3 1,676 reviews	Search Scandinavian Airlines flights
Virgin Atlantic	PriceFrom $471	Free Cancellation	Rating 7.5 678 reviews	Search Virgin Atlantic flights
KLM	PriceFrom $488	Free Cancellation	Rating 7.7 1,448 reviews	Search KLM flights
American Airlines	PriceFrom $497	Free Cancellation	Rating 7.2 11,212 reviews	Search American Airlines flights
United Airlines	PriceFrom $506	Free Cancellation	Rating 7.4 9,229 reviews	Search United Airlines flights

Cheap flights from Washington, D.C. to London from $277

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 2/9. 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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