Question 1

Which is the best airline for flights from London to Washington, D.C., KLM or Austrian Airlines?

Accepted Answer

The two airlines most popular with KAYAK users for flights from London to Washington, D.C. are KLM and Austrian Airlines. With an average price for the route of £597 and an overall rating of 7.8, KLM is the most popular choice. Austrian Airlines is also a great choice for the route, with an average price of £569 and an overall rating of 7.6.

Question 2

How long does a flight from London to Washington Dulles Airport take?

Accepted Answer

Direct flights take on average 8h 00m to travel the 3,677 miles between London and Washington Dulles Airport.

Question 3

How many flights are there between London and Washington, D.C. Dulles Intl Airport per day?

Accepted Answer

Each day, there are 6 direct flights that take off from London and land in Washington, D.C. Dulles Intl Airport, with an average flight time of 8h 22m. The most common departure time is 12:00 and most flights take off in the afternoon. Each week, there are 42 flights and there are the same number of flights each day (6).

Question 4

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

Accepted Answer

In the last 5 days, the lowest price for a flight from London to Washington, D.C. Dulles Intl Airport was £354 for a one-way ticket and £422 for a return.

Question 5

Which airlines fly most frequently between London and Washington Dulles Airport?

Accepted Answer

London and Washington Dulles Airport are connected by different airlines. The airlines that fly that route the most regularly are British Airways (21 flights per week), United Airlines (14 flights per week), and Virgin Atlantic (7 flights per week).

Question 6

What’s the cheapest day of the week to fly from London to Washington Dulles Airport?

Accepted Answer

Your flight ticket price will generally be cheaper if you fly to Washington Dulles Airport on a Friday and more expensive on a Sunday. On your return trip to London, you should consider flying back on a Monday, and avoid Saturdays for better deals.

Question 7

Which airports will I be using when flying from London to Washington Dulles Airport?

Accepted Answer

When flying out of London you will be using one of these airports: London Gatwick, London Heathrow, London Southend, or London Stansted. You will be landing at Washington, D.C. Dulles Intl.

Question 8

What’s the earliest departure time from London to Washington Dulles Airport?

Accepted Answer

Early birds can take the earliest flight from London at 12:15 and will be landing in Washington, D.C. Dulles Intl Airport at 15:30.

Question 9

What’s the latest departure time from London to Washington Dulles Airport?

Accepted Answer

If you prefer to fly at night, the latest flight from London to Washington, D.C. Dulles Intl Airport jets off at 17:05 and lands at 20:20.

Question 10

Which airlines fly direct between London and Washington, D.C. Dulles Intl Airport?

Accepted Answer

There are 12 airlines that fly direct from London to Washington, D.C. Dulles Intl Airport. They are: Aer Lingus, Air France, American Airlines, Austrian Airlines, British Airways, Delta, Finnair, Iberia, KLM, Lufthansa, United Airlines and Virgin Atlantic. The cheapest price of all airlines flying this route was found with Aer Lingus at £374 for a return flight. On average, the best prices for this route can be found at Virgin Atlantic.

Question 11

Which airlines offer Wi-Fi service onboard planes from London to Washington Dulles Airport?

Accepted Answer

Only KLM offers inflight Wi-Fi service on the London to Washington Dulles Airport flight route.

Question 12

Which aircraft models fly most regularly from London to Washington Dulles Airport?

Accepted Answer

The Boeing 777 is the aircraft model that flies most regularly on the London to Washington Dulles Airport flight route.

Question 13

Which airline alliances offer flights from London to Washington Dulles Airport?

Accepted Answer

oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between London and Washington Dulles Airport, with oneworld being the most commonly used for this route.

Question 14

On which days can I fly direct from London to Washington Dulles Airport?

Accepted Answer

There are direct flights from London to Washington Dulles Airport on a daily basis.

Question 15

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

Accepted Answer

The cheapest month for flights from London to Washington, D.C. Dulles Intl Airport is February, where tickets cost £479 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is £574 and £570 respectively.

Question 16

How does KAYAK find such low prices on flights from London to Washington Dulles Airport?

Accepted Answer

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to Washington Dulles Airport.

Question 17

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to Washington Dulles Airport?

Accepted Answer

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from London is likely to change within 7 days, so travellers know whether to wait or book now.

Question 18

What is the Hacker Fare option on flights from London to Washington Dulles Airport?

Accepted Answer

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Washington Dulles Airport with an airline and back to London with another airline.

Question 19

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to Washington Dulles Airport?

Accepted Answer

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington Dulles Airport from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Question 20

What is the cheapest stopover airport when flying from London to Washington Dulles Airport?

Accepted Answer

Flights via Montreal (YUL) offer the most affordable fares, with an average price of £445 for a return.

Question 21

What is the most popular stopover airport when flying from London to Washington Dulles Airport?

Accepted Answer

Dublin (DUB) is the top choice – 45% of KAYAK users who clicked on one-stop flights from London to Washington Dulles Airport picked an itinerary connecting there.

Question 22

Which stopover airport has the quickest connection when flying from London to Washington Dulles Airport?

Accepted Answer

If you prefer a quick connection, Madrid (MAD) often has the shortest stopovers from London to Washington Dulles Airport, with an average time of 1h 00m.

Question 23

Which stopover airport offers the shortest total travel time from London to Washington Dulles Airport?

Accepted Answer

Consider flying via Amsterdam (AMS) for the shortest journey. The average one-way travel time for flights connecting there is 10h 57m.

Question 24

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

Accepted Answer

Weekly flights between London and Washington, D.C. historically see delays in approximately 16% of cases, with the average delay over the past year being 141 minutes.

Question 25

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

Accepted Answer

Based on our data, United Airlines have experienced the fewest delays on this route in the past 12 months, with only about 10% of their flights encountering any delays.

Question 26

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

Accepted Answer

Statistically, Monday is the day of the week with the fewest delays on this flight route, while Thursday has typically experienced more delays than other days.

Question 27

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

Accepted Answer

Typically, flights leaving in the evening tend to face fewer delays, whereas flights in the morning have historically encountered delays more often.

Question 28

Which cabin class options are there for flights between London and Washington, D.C. Dulles Intl Airport?

Accepted Answer

There are 4 cabin class options for the route. These are First, Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Question 29

Which airlines provide the cheapest flights from London to Washington Dulles Airport?

Accepted Answer

In the past 5 days, the cheapest return tickets from London to Washington Dulles Airport were found on Iberia (£422) and KLM (£423).

Question 30

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

Accepted Answer

The cheapest return flight from London to Washington, D.C. Dulles Intl Airport costs £418 on the route between London Heathrow Airport (LHR) and Washington, D.C. Dulles Intl Airport (IAD). It is also the most popular route.

Question 31

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

Accepted Answer

To get a below average price on the flight from London to Washington, D.C. Dulles Intl Airport, you should book around 6 weeks before departure, which saves you about 35% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Question 32

Can I save money by flying with a stopover from London to Washington, D.C. Dulles Intl Airport?

Accepted Answer

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 1 stop stopover the cheapest option at £454 on average.

Question 33

How much is a return flight from London to Washington, D.C. Dulles Intl Airport?

Accepted Answer

Flight prices are typical for this route right now.Flights to Washington, D.C. Dulles Intl Airport from London usually cost between £404 and £547 in February.
The lowest price found in the past 5 days was £422 on Iberia (22 Feb–4 Mar).

Question 34

What are the most popular airlines flying to Washington, D.C. Dulles Intl Airport?

Accepted Answer

The most popular airline among KAYAK users flying to Washington, D.C. Dulles Intl Airport is Virgin Atlantic, followed by British Airways and Lufthansa.

Low season	January
High season	July
Cheapest flight	£354

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Cheap Flights from London to Dulles Intl (LON-IAD)

Recent return flight deals from London to Dulles Intl

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KAYAK’s insights & trends for London to Dulles Intl flights

How much is a return flight from London to Washington, D.C. Dulles Intl Airport?

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

What’s the cheapest day of the week to fly from London to Washington Dulles Airport?

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

Can I save money by flying with a stopover from London to Washington, D.C. Dulles Intl Airport?

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

Which airlines provide the cheapest flights from London to Washington Dulles Airport?

Which airlines fly most frequently between London and Washington Dulles Airport?

Which airlines fly direct between London and Washington, D.C. Dulles Intl Airport?

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

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

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

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

What is the most popular stopover airport when flying from London to Washington Dulles Airport?

What is the cheapest stopover airport when flying from London to Washington Dulles Airport?

Which stopover airport offers the shortest total travel time from London to Washington Dulles Airport?

Which stopover airport has the quickest connection when flying from London to Washington Dulles Airport?

Which cabin class options are there for flights between London and Washington, D.C. Dulles Intl Airport?

How many flights are there between London and Washington, D.C. Dulles Intl Airport per day?

How long does a flight from London to Washington Dulles Airport take?

What’s the earliest departure time from London to Washington Dulles Airport?

What’s the latest departure time from London to Washington Dulles Airport?

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