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

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. Visit our flight page for the latest deals!>/a>

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

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from London to Washington is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

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

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from London to Washington with an airline and back with another airline. Visit our flight page for the latest deals!>/a>

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

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 from London to Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

Which airlines provide the cheapest flights from London to Washington?

In the past 3 days, the cheapest round-trip tickets from London to Washington were found on United Airlines ($266) and WestJet ($522).

What is the cheapest time of day to fly to Washington?

The cheapest time of day to fly to Washington is generally in the evening , when round-trip flights cost $330 on average. Morning departures are around 45% more expensive than evening flights, on average. The most expensive time of day to fly to Washington is generally in the morning, which is peak travel time and where the average cost of a ticket is $477.

How long does a flight from London to Washington take?

The duration of a flight to Washington depends on your arrival airport. The shortest route to Washington from London is to Seattle , which takes 7h 30m .

$148 CHEAP FLIGHTS from London to Washington

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Flights Deals

Best Washington Flight Deals from London

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

One-wayRound-trip

Seattle1 stop$266

Cheap Flights from London to Washington

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from London to Washington that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Round-trip

One-way

Recent round-trip flight deals from London to Washington

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from London to Washington.

Discover the best prices for you by selecting your travel dates on KAYAK.

6:15 am - 10:45 amYXU-SEA

7h 30m1 stop

11:21 pm - 2:57 pmSEA-YXU

12h 36m2 stops

$266United Airlines

Find Deal

Mon, May 19 - Fri, Jun 20

6:15 am - 10:51 amYXU-SEA

7h 36m1 stop

5:05 pm - 2:57 pmSEA-YXU

18h 52m2 stops

$270United Airlines

Find Deal

Thu, Jun 12 - Thu, Jun 19

3:45 pm - 12:59 amYXU-SEA

12h 14m2 stops

5:26 pm - 2:57 pmSEA-YXU

18h 31m2 stops

$276United Airlines

Find Deal

Mon, May 19 - Fri, Jun 20

6:15 am - 4:20 pmYXU-SEA

13h 05m2 stops

5:05 pm - 2:57 pmSEA-YXU

18h 52m2 stops

$329United Airlines

Find Deal

Thu, Jun 12 - Thu, Jun 19

6:00 am - 12:58 pmYXU-SEA

9h 58m1 stop

7:10 am - 9:00 pmSEA-YXU

10h 50m1 stop

$387

Find Deal

Mon, May 19 - Fri, Jun 20

6:00 am - 12:34 amYXU-SEA

21h 34m2 stops

7:05 am - 5:14 amSEA-YXU

19h 09m1 stop

$415

Find Deal

Fri, Jun 27 - Sun, Jul 6

8:00 pm - 12:58 pmYXU-SEA

19h 58m1 stop

7:05 am - 5:14 amSEA-YXU

19h 09m1 stop

$522WestJet

Find Deal

Fri, Jun 27 - Sun, Jul 6

6:15 am - 10:51 amYXU-SEA

7h 36m1 stop

11:35 am - 9:27 pmSEA-YXU

6h 52m1 stop

$571United Airlines

Find Deal

Thu, Jun 12 - Thu, Jun 19

8:00 pm - 7:32 amYXU-SEA

14h 32m2 stops

3:40 pm - 5:14 amSEA-YXU

10h 34m2 stops

$622WestJet

Find Deal

Fri, Jun 27 - Sun, Jul 6

6:00 am - 2:09 pmYXU-SEA

11h 09m2 stops

1:15 pm - 5:14 amSEA-YXU

12h 59m3 stops

$1,727WestJet

Find Deal

Fri, Jun 27 - Sun, Jul 6

Useful Info

KAYAK's insights & trends for London to Washington flights

Get data-powered insights and trends into flights from London to Washington to help you find the cheapest flights, the best time to fly and much more.

Prices

Airlines

If you are looking for a flight deal from London to Washington, look for departures on Saturdays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from Washington, Thursday is the cheapest day to fly and Tuesday is the most expensive.

Find deals

Low season	May
High season	July
Cheapest flight	$148

Best time to beat the crowds with an average 51% drop in price.

Most popular time to fly and prices are also 39% lower on average.

Flight from London to Seattle

How does KAYAK find such low prices on flights from London to Washington?
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.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to Washington?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from London to Washington is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from London to Washington?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from London to Washington with an airline and back with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to Washington?
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 from London to Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.
What is the cheapest time of day to fly to Washington?
The cheapest time of day to fly to Washington is generally in the evening, when round-trip flights cost $330 on average. Morning departures are around 45% more expensive than evening flights, on average. The most expensive time of day to fly to Washington is generally in the morning, which is peak travel time and where the average cost of a ticket is $477.

Everything you need to know for your flight from London to Washington

Airports

Cabin class

Complete your trip

Flights to other cities

Origins

Popular routes

Return flight deals

Information on your arrival and departure airports

London (YXU)

$148 Find Cheap Flights from London to Washington

KAYAK searches hundreds of travel sites at once for deals on flights to Washington

Best Washington Flight Deals from London

Cheap Flights from London to Washington

Recent round-trip flight deals from London to Washington

Recent one-way flight deals from London to Washington

KAYAK's insights & trends for London to Washington flights

Get data-powered insights and trends into flights from London to Washington to help you find the cheapest flights, the best time to fly and much more.

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

If you are looking for a flight deal from London to Washington, look for departures on Saturdays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from Washington, Thursday is the cheapest day to fly and Tuesday is the most expensive.

Which airlines provide the cheapest flights from London to Washington?

In the past 3 days, the cheapest round-trip tickets from London to Washington were found on United Airlines ($266) and WestJet ($522).

How long does a flight from London to Washington take?

The duration of a flight to Washington depends on your arrival airport. The shortest route to Washington from London is to Seattle, which takes 7h 30m.

Good to know

FAQs - booking Washington flights

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

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.

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

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

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

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

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

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 from London to Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

What is the cheapest time of day to fly to Washington?

Everything you need to know for your flight from London to Washington

Information on your arrival and departure airports

Cabin class types available on flights to Washington

Complete your trip to Washington with a hotel stay or car rental

Flights to other popular destinations

Flights from other airports in London to Washington

Flights to popular cities in Washington

Find deals for your return flight