Question 1

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

Accepted Answer

24 flights are operational daily from London to Washington, D.C. Dulles Intl Airport as of February 2026. The most popular departure time for this route is 16:00, with 100% of flights per day taking off in the afternoon.

Question 2

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

Accepted Answer

You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around £545 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. Dulles Intl Airport from London for as low as £525 on momondo.

Question 3

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

Accepted Answer

Flights via Lisbon (LIS) offer the lowest average return price of £447.

Question 4

Which airlines fly to Washington, D.C. Dulles Intl Airport?

Accepted Answer

Virgin Atlantic, British Airways and Lufthansa are the top three most popular airlines that fly to Washington, D.C. Dulles Intl Airport from London according to our data. Virgin Atlantic is the first choice among our users, with 45% of people opting to fly with this airline when travelling to Washington, D.C. Dulles Intl Airport. Keep in mind that there are 16 different airlines that fly to Washington, D.C. Dulles Intl Airport on a routine basis, so you have a few additional options to choose from.

Question 5

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

Accepted Answer

The number of flights available between London and Washington, D.C. Dulles Intl Airport is 170 per week as of February 2026. The most frequent departure day is Tue, with 15% of weekly flights leaving on this day.

Question 6

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

Accepted Answer

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

Question 7

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

Accepted Answer

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

Question 8

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

Accepted Answer

Wednesday 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 9

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

Accepted Answer

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

Question 10

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 132 minutes.

Question 11

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

Accepted Answer

Reykjavik (KEF) was the most common stop: 44% of momondo users choosing one-stop flights on this route connected there.

Question 12

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

Accepted Answer

As of February 2026, prices for London to Washington, D.C. Dulles Intl Airport flights are approximately 26% more expensive when compared to flights at the same time last year.

Question 13

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

Accepted Answer

The cheapest time of day to fly to Washington, D.C. Dulles Intl Airport is at midday when flights can be purchased for as low as £583. In contrast, the most expensive time of day to depart to Washington, D.C. Dulles Intl Airport is in the morning when prices are around £586.

Question 14

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

Accepted Answer

Reykjavik (KEF) has the shortest average stopover time for this route: 1h 26m.

Question 15

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

Accepted Answer

Flights connecting via Reykjavik (KEF) have the shortest average one-way travel time: 11h 19m.

Question 16

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

Accepted Answer

Prices are currently low for flights on this route.Typical prices usually range from £441 to £562.
The lowest price recently found on this route was £394.

Question 17

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

Accepted Answer

The month of September is, on average, the cheapest month to fly to Washington, D.C. Dulles Intl Airport from London, with most prices found around £477. If you aren’t able to travel during the month of September, then book flights to Washington, D.C. Dulles Intl Airport from London during November instead. Flights to Washington, D.C. Dulles Intl Airport in November, while not as cheap as those in September, still average around £488.

Question 18

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

Accepted Answer

According to our data, Thursday is the cheapest day to fly to Washington, D.C. Dulles Intl Airport from London. The lowest ticket price found for a Thursday departure recently was £573. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. On the other hand, Sunday is the most expensive day to depart from London because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £617.

Question 19

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

Accepted Answer

Icelandair, SWISS, and British Airways are the most popular carriers operating from London to Washington, D.C. Dulles Intl

Question 20

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

Accepted Answer

You could potentially save up to 10% on your flight if you consider stops on a London to Washington, D.C. Dulles Intl Airport flight.

Question 21

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 9% of their flights experiencing any sort of delay.

Question 22

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

Accepted Answer

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

Question 23

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

Accepted Answer

As of February 2026, there are 16 operators available to choose from for flights from London to Washington, D.C. Dulles Intl Airport.

Question 24

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

Question 25

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

Accepted Answer

The travel and health documents required for your trip to Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best price found	£465
Fastest flight time	8h 00m
Direct flights	Every day

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom £185	Free Cancellation	Rating 7.9 8,142 reviews	Search Delta flights
Icelandair	PriceFrom £329	Free Cancellation	Rating 7.1 606 reviews	Search Icelandair flights
TAP AIR PORTUGAL	PriceFrom £335	Free Cancellation	Rating 7.1 2,133 reviews	Search TAP AIR PORTUGAL flights
Aer Lingus	PriceFrom £369	Free Cancellation	Rating 7.2 1,444 reviews	Search Aer Lingus flights
United Airlines	PriceFrom £385	Free Cancellation	Rating 7.4 9,235 reviews	Search United Airlines flights
Lufthansa	PriceFrom £396	Free Cancellation	Rating 6.8 7,759 reviews	Search Lufthansa flights
Austrian Airlines	PriceFrom £408	Free Cancellation	Rating 7.5 896 reviews	Search Austrian Airlines flights
Virgin Atlantic	PriceFrom £411	Free Cancellation	Rating 7.5 678 reviews	Search Virgin Atlantic flights
British Airways	PriceFrom £411	Free Cancellation	Rating 6.7 7,714 reviews	Search British Airways flights
KLM	PriceFrom £416	Free Cancellation	Rating 7.7 1,448 reviews	Search KLM flights

Cheap flights from London to Washington, D.C. from £358

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