Question 1

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

Accepted Answer

The cheapest time of day to fly to London is in the afternoon when flights can be purchased for as low as £541. Flights in the evening are often more expensive, with an average ticket price of £564.

Question 2

What is the cheapest month to fly to London?

Accepted Answer

The cheapest month to fly to London from Washington, D.C. is in September. Flight prices, which tend to average around £461, 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 £471.

Question 3

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

Accepted Answer

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

Question 4

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

Accepted Answer

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 £554 when searching weeks before you fly. 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 £518 on momondo.

Question 5

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

Accepted Answer

Flights via Reykjavik (KEF) offer the lowest average return price of £333.

Question 6

Which airlines fly to London?

Accepted Answer

British Airways, Virgin Atlantic and United 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 48% of people opting to fly with this airline when travelling to London. Keep in mind that there are 8 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

Question 7

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

Accepted Answer

25 flights are operational daily from Washington, D.C. to London as of February 2026. The most popular departure time for this route is 18:00, with 100% of flights per day taking off in the evening.

Question 8

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

Accepted Answer

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

Question 9

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

Accepted Answer

Reykjavik (KEF) has the shortest average stopover time for this route: 1h 10m.

Question 10

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

Accepted Answer

Flights connecting via New York (JFK) have the shortest average one-way travel time: 9h 40m.

Question 11

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

Accepted Answer

As of February 2026, prices for Washington, D.C. to London flights are approximately 49% more expensive when compared to flights at the same time last year.

Question 12

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

Question 13

How long does it take to fly to London?

Accepted Answer

Flight times from Washington, D.C. to London vary, but if you’re flying out of Baltimore and flying into London Heathrow Airport (one of the most popular routes), then the duration is 7h 05m on average. Another popular route from Washington, D.C. to London is flying from Washington, D.C. to London Heathrow Airport, which will take roughly 8h 05m. Keep in mind that layovers or delays could extend your travel time.

Question 14

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 15

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 16

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

Accepted Answer

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.

Question 17

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

Accepted Answer

You could potentially save up to 31% on your flight if you consider stops on a Washington, D.C. to London flight.

Question 18

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

Accepted Answer

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 163 minutes.

Question 19

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

Accepted Answer

176 flights are operational weekly from Washington, D.C. to London as of February 2026. The most popular departure day for this route is Sat, with 18% of flights per week taking off on this day.

Question 20

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

Accepted Answer

Our data shows that Sunday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £524. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. to London for around £600.

Question 21

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

Accepted Answer

Reykjavik (KEF) was the most common stop: 41% of momondo users choosing one-stop flights on this route connected there.

Question 22

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

Accepted Answer

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

Question 23

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

Accepted Answer

As of February 2026, there are 8 operators available to choose from for flights from Washington, D.C. to London.

Question 24

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

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.

Question 25

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

Accepted Answer

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.

Best price found	£304
Fastest flight time	7h 05m
Direct flights	Every day
Airports in London	6 airports

Airline	Rating	Free Cancellation	Price
Lufthansa	PriceFrom £304	Free Cancellation	Rating 6.8 7,773 reviews	Search Lufthansa flights
Icelandair	PriceFrom £363	Free Cancellation	Rating 7.1 606 reviews	Search Icelandair flights
Virgin Atlantic	PriceFrom £376	Free Cancellation	Rating 7.5 678 reviews	Search Virgin Atlantic flights
British Airways	PriceFrom £380	Free Cancellation	Rating 6.7 7,720 reviews	Search British Airways flights
Air France	PriceFrom £391	Free Cancellation	Rating 7.4 1,531 reviews	Search Air France flights
Iberia	PriceFrom £451	Free Cancellation	Rating 7.0 3,108 reviews	Search Iberia flights
United Airlines	PriceFrom £486	Free Cancellation	Rating 7.4 9,255 reviews	Search United Airlines flights
American Airlines	PriceFrom £504	Free Cancellation	Rating 7.2 11,249 reviews	Search American Airlines flights

Cheap flights from Washington, D.C. to London from £156

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 23/3. 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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