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

Prices are currently low for flights on this route. Typical prices usually range from £544 to £822. The lowest price recently found on this route was £464.

Question 1

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 £544 to £822.
The lowest price recently found on this route was £464.

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 £570 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 £509 on momondo.

Question 3

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

Accepted Answer

SWISS, Lufthansa, and Austrian Airlines are the most popular carriers operating from London to Washington, D.C. Dulles Intl

Question 4

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 25m.

Question 5

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 in the evening when flights can be purchased for as low as £530. In contrast, the most expensive time of day to depart to Washington, D.C. Dulles Intl Airport is in the afternoon when prices are around £611.

Question 6

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 174 per week as of December 2025. The most frequent departure day is Tue, with 15% of weekly flights leaving on this day.

Question 7

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

Accepted Answer

As of December 2025, prices for London to Washington, D.C. Dulles Intl Airport flights are approximately 33% more expensive when compared to flights at the same time last year.

Question 8

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

Accepted Answer

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

Question 9

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 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 131 minutes.

Question 11

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 £457.

Question 12

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 13

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 14

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 December 2025. The most popular departure time for this route is 16:00, with 100% of flights per day taking off in the afternoon.

Question 15

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 £488. 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 £499.

Question 16

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 42% 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 17

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 18

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 19

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: 31% of momondo users choosing one-stop flights on this route connected there.

Question 20

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 21

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 £592. 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 £652.

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 December 2025, 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	£543
Fastest flight time	8h 05m
Direct flights	Every day

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom £189	Free Cancellation	Rating 7.9 8,009 reviews	Search Delta flights
TAP AIR PORTUGAL	PriceFrom £350	Free Cancellation	Rating 7.2 2,091 reviews	Search TAP AIR PORTUGAL flights
Icelandair	PriceFrom £373	Free Cancellation	Rating 7.0 591 reviews	Search Icelandair flights
Aer Lingus	PriceFrom £384	Free Cancellation	Rating 7.2 1,399 reviews	Search Aer Lingus flights
United Airlines	PriceFrom £407	Free Cancellation	Rating 7.4 9,093 reviews	Search United Airlines flights
Lufthansa	PriceFrom £423	Free Cancellation	Rating 6.8 7,635 reviews	Search Lufthansa flights
Finnair	PriceFrom £423	Free Cancellation	Rating 7.6 1,338 reviews	Search Finnair flights
Scandinavian Airlines	PriceFrom £425	Free Cancellation	Rating 7.4 1,607 reviews	Search Scandinavian Airlines flights
KLM	PriceFrom £433	Free Cancellation	Rating 7.7 1,428 reviews	Search KLM flights
Virgin Atlantic	PriceFrom £434	Free Cancellation	Rating 7.5 675 reviews	Search Virgin Atlantic flights

Cheap flights from London to Washington, D.C. from £429

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Washington, D.C. departing on 23/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from London to Washington, D.C.

Cheap return flights

Cheap one-way flights

Cheap last-minute flights

Cheap direct flights

Scandinavian Airlines flights from London to Washington, D.C. Dulles Intl Airport

Our best Scandinavian Airlines deals on London to Washington, D.C. Dulles Intl Airport flight tickets

Icelandair flights from London to Washington, D.C. Dulles Intl Airport

Our best Icelandair deals on London to Washington, D.C. Dulles Intl Airport flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from London to Washington, D.C. Dulles Intl Airport that are best for you.

See travel insights to Washington, D.C. from

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