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

Prices are currently low for flights on this route. Typical prices usually range from £492 to £762. The lowest price recently found on this route was £463.

Question 1

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

Accepted Answer

As of December 2025, there are 27 flights per day flying from London Heathrow Airport to Washington, D.C.. The most common time of day flights depart is 16:00, with 100% of flights taking off in the afternoon.

Question 2

What is the most punctual flight time for London to Washington, D.C. 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 3

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

Accepted Answer

Flights via Zurich (ZRH) offer the lowest average return price of £344.

Question 4

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

Accepted Answer

Prices are currently low for flights on this route.Typical prices usually range from £492 to £762.
The lowest price recently found on this route was £463.

Question 5

What is the cheapest time of day to depart on your flight to Washington, D.C.?

Accepted Answer

In the evening is the cheapest time of day to fly from London Heathrow Airport to Washington, D.C. when you can find flight prices for as low as £512. Flying to Washington, D.C. in the evening is an ideal time because this is during off-peak travel hours. Flights to Washington, D.C. are more costly in the afternoon, with an average ticket price of £610. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Question 6

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

Accepted Answer

Historically, on average around 17% of flights between London and Washington, D.C. have experienced a delay on any given week. The average delay length over the past 12 months has been 131 minutes.

Question 7

What is the cheapest month to fly to Washington, D.C.?

Accepted Answer

The cheapest month to fly to Washington, D.C. from London Heathrow Airport is in September. Flight prices, which tend to average around £483, are often lower during this time because this is during the off-season. If you don’t want to visit Washington, D.C. in September, then you should wait until November to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of £495.

Question 8

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

Accepted Answer

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

Question 9

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

Accepted Answer

You could potentially save up to 33% on your flight if you consider stops on a London Heathrow Airport to Washington, D.C. flight.

Question 10

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

Accepted Answer

Reykjavik (KEF) has the shortest average stopover time for this route: 1h 19m.

Question 11

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

Accepted Answer

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

Question 12

Which airlines fly to Washington, D.C.?

Accepted Answer

British Airways, Virgin Atlantic and Lufthansa are the top three most popular airlines that fly to Washington, D.C. from London Heathrow Airport 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 Washington, D.C.. Keep in mind that there are 18 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.

Question 13

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

Accepted Answer

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

Question 14

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

Accepted Answer

You are more likely to see cheaper flights to Washington, D.C. from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around £569 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from London Heathrow Airport for as low as £508 on momondo.

Question 15

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

Accepted Answer

Dublin (DUB) was the most common stop: 25% of momondo users choosing one-stop flights on this route connected there.

Question 16

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

Accepted Answer

Flights connecting via New York (JFK) have the shortest average one-way travel time: 11h 11m.

Question 17

What is the cheapest day to depart on your flight to Washington, D.C.?

Accepted Answer

On average, the least expensive day to fly to Washington, D.C. from London Heathrow Airport is on a Thursday. momondo users have found tickets for Thursday departures for as low as £590. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from London Heathrow Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £650.

Question 18

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

Accepted Answer

According to our data, Virgin Atlantic have had the fewest delays on this route over the last 12 months, with about 8% of their flights experiencing any sort of delay.

Question 19

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. Thursday has historically seen more delays on average compared to the rest of the week.

Question 20

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

Accepted Answer

191 flights are operational weekly from London Heathrow Airport to Washington, D.C. as of December 2025. The most popular departure day for this route is Tue, with 16% of flights per week taking off on this day.

Question 21

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

Accepted Answer

As of December 2025, prices for London Heathrow Airport to Washington, D.C. flights are approximately 28% more expensive when compared to flights at the same time last year.

Question 22

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

Accepted Answer

Prices for flights from London Heathrow Airport to Washington, D.C. are updated daily.

Question 23

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

Accepted Answer

As of December 2025, there are 18 operators available to choose from for flights from London Heathrow Airport to Washington, D.C..

Question 24

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

Accepted Answer

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Washington, D.C..

Question 25

What documentation or ID do you need to fly to Washington, D.C.?

Accepted Answer

The travel and health documents required for your trip to Washington, D.C. can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C.. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best price found	£542
Fastest flight time	8h 05m
Direct flights	Every day
Airports in Washington, D.C.	2 airports

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom £189	Free Cancellation	Rating 7.9 8,009 reviews	Search Delta flights
PLAY	PriceFrom £275	Free Cancellation	Rating 7.0 103 reviews	Search PLAY flights
TAP AIR PORTUGAL	PriceFrom £349	Free Cancellation	Rating 7.2 2,091 reviews	Search TAP AIR PORTUGAL flights
Icelandair	PriceFrom £365	Free Cancellation	Rating 7.0 591 reviews	Search Icelandair flights
Aer Lingus	PriceFrom £383	Free Cancellation	Rating 7.2 1,393 reviews	Search Aer Lingus flights
United Airlines	PriceFrom £406	Free Cancellation	Rating 7.4 9,094 reviews	Search United Airlines flights
JetBlue	PriceFrom £414	Free Cancellation	Rating 7.2 2,894 reviews	Search JetBlue flights
Lufthansa	PriceFrom £421	Free Cancellation	Rating 6.8 7,632 reviews	Search Lufthansa flights
Finnair	PriceFrom £422	Free Cancellation	Rating 7.6 1,337 reviews	Search Finnair flights
Scandinavian Airlines	PriceFrom £424	Free Cancellation	Rating 7.4 1,606 reviews	Search Scandinavian Airlines flights

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

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

What is the cheapest month to fly to Washington, D.C.?

What is the cheapest day to depart on your flight to Washington, D.C.?

What is the cheapest time of day to depart on your flight to Washington, D.C.?

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

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

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

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

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

You could potentially save up to 33% on your flight if you consider stops on a London Heathrow Airport to Washington, D.C. flight.

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

As of December 2025, prices for London Heathrow Airport to Washington, D.C. flights are approximately 28% more expensive when compared to flights at the same time last year.

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

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

Which airlines fly to Washington, D.C.?

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

Historically, on average around 17% of flights between London and Washington, D.C. have experienced a delay on any given week. The average delay length over the past 12 months has been 131 minutes.

What is the most punctual flight time for London to Washington, D.C. 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. Thursday has historically seen more delays on average compared to the rest of the week.

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

According to our data, Virgin Atlantic have had the fewest delays on this route over the last 12 months, with about 8% of their flights experiencing any sort of delay.

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

Dublin (DUB) was the most common stop: 25% of momondo users choosing one-stop flights on this route connected there.

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

Flights via Zurich (ZRH) offer the lowest average return price of £344.

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

Flights connecting via New York (JFK) have the shortest average one-way travel time: 11h 11m.

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

Reykjavik (KEF) has the shortest average stopover time for this route: 1h 19m.

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

As of December 2025, there are 27 flights per day flying from London Heathrow Airport to Washington, D.C.. The most common time of day flights depart is 16:00, with 100% of flights taking off in the afternoon.

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

191 flights are operational weekly from London Heathrow Airport to Washington, D.C. as of December 2025. The most popular departure day for this route is Tue, with 16% of flights per week taking off on this day.

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

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

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

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

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

What documentation or ID do you need to fly to Washington, D.C.?

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

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