How many flights depart from London to State of Washington on average per day?

The number of flights available between London and State of Washington is 24 per day as of September 2025. The most frequent departure time is 4:00PM, with 67% of daily flights leaving in the afternoon.

How many flights depart from London to State of Washington on average per week?

The number of flights available between London and State of Washington is 169 per week as of September 2025. The most frequent departure day is Wed, with 17% of weekly flights leaving on this day.

What is the cheapest airline that flies from London to Washington?

WestJet, Aer Lingus, and Iberia are the most popular carriers operating from London to Washington

What airlines fly to State of Washington?

British Airways, Delta and Virgin Atlantic are the top three most popular airlines that fly to State of Washington from London according to our data. British Airways is the first choice among our users, with 37% of people opting to fly with this airline when traveling to State of Washington. Keep in mind that there are 5 different airlines that fly to State of Washington on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from London to Washington?

Prices for flights from London to Washington refresh daily.

How many operators does momondo search for flights from London to Washington?

As of September 2025, there are 6 operators available to choose from for flights from London to Washington.

How old do you have to be to fly from London to Washington?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Washington.

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

The required travel and health documents for your Washington trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$496 Cheap Flights from London to Washington in 2025

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Cheap round-trip flights

5:00 pm - 10:35 amLHR-SEA

25h 35m2 stops

12:59 am - 10:25 amSEA-LHR

25h 26m1 stop

$606Finnair

Find Deal

Mon, Nov 10 - Sun, Nov 16

3:40 pm - 8:40 pmLGW-SEA

13h 00m1 stop

2:35 pm - 10:55 amSEA-LGW

12h 20m1 stop

$607Icelandair

Find Deal

Tue, Oct 7 - Tue, Nov 11

1:25 pm - 3:30 pmLHR-SEA

10h 05mnonstop

5:35 pm - 11:20 amSEA-LHR

9h 45mnonstop

$609Virgin Atlantic

Find Deal

Mon, Sep 22 - Mon, Oct 6

9:25 am - 12:30 pmLHR-SEA

10h 05mnonstop

7:50 pm - 12:20 pmSEA-LHR

9h 30mnonstop

$610British Airways

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Tue, Mar 10 - Tue, Mar 17

7:45 pm - 11:15 amLHR-SEA

23h 30m1 stop

5:35 pm - 11:20 amSEA-LHR

9h 45mnonstop

$613Virgin Atlantic

Find Deal

Mon, Sep 22 - Mon, Oct 6

6:30 am - 12:10 pmLHR-SEA

13h 40m1 stop

11:39 pm - 6:40 amSEA-LHR

23h 01m1 stop

$623United Airlines

Find Deal

Sat, Dec 6 - Fri, Dec 26

6:30 am - 4:05 pmLHR-SEA

17h 35m1 stop

8:25 pm - 2:15 pmSEA-LHR

9h 50mnonstop

$624Delta

Find Deal

Wed, Oct 8 - Tue, Oct 14

6:30 am - 11:45 amLHR-SEA

13h 15m1 stop

5:40 pm - 10:30 amSEA-LHR

9h 50mnonstop

$625Delta

Find Deal

Mon, Nov 3 - Thu, Mar 12

4:15 pm - 10:59 pmLHR-SEA

14h 44m1 stop

12:43 pm - 9:40 amSEA-LHR

12h 57m1 stop

$626United Airlines

Find Deal

Sun, Sep 21 - Thu, Oct 2

2:55 pm - 4:55 pmLHR-SEA

10h 00mnonstop

6:50 pm - 12:20 pmSEA-LHR

9h 30mnonstop

$651British Airways

Find Deal

Tue, Nov 4 - Sun, Nov 16

Icelandair flights from London to State of Washington

Our best Icelandair deals on London to State of Washington flight tickets

Icelandair

Oct 7

LGW3:40 pmLondon Gatwick

13h 00m

1 stop

SEA8:40 pmSeattle/Tacoma Intl

Nov 11

SEA2:35 pmSeattle/Tacoma Intl

12h 20m

1 stop

LGW10:55 amLondon Gatwick

$607

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Icelandair

Oct 7

LHR1:05 pmLondon Heathrow

15h 35m

1 stop

SEA8:40 pmSeattle/Tacoma Intl

Nov 10

SEA2:35 pmSeattle/Tacoma Intl

20h 55m

1 stop

LHR7:30 pmLondon Heathrow

$611

Find similar

Icelandair

Oct 11

LGW3:40 pmLondon Gatwick

13h 00m

1 stop

SEA8:40 pmSeattle/Tacoma Intl

Oct 13

SEA7:00 pmSeattle/Tacoma Intl

11h 35m

1 stop

LGW2:35 pmLondon Gatwick

$615

Find similar

Lufthansa flights from London to State of Washington

Our best Lufthansa deals on London to State of Washington flight tickets

Lufthansa

Oct 5

LHR6:30 amLondon Heathrow

13h 25m

1 stop

SEA11:55 amSeattle/Tacoma Intl

Dec 10

SEA7:00 amSeattle/Tacoma Intl

18h 40m

2 stops

LHR9:40 amLondon Heathrow

$608

Find similar

Lufthansa

Sep 18

LHR6:30 amLondon Heathrow

13h 25m

1 stop

SEA11:55 amSeattle/Tacoma Intl

Sep 27

SEA1:12 pmSeattle/Tacoma Intl

13h 28m

1 stop

LHR10:40 amLondon Heathrow

$610

Find similar

Lufthansa

Sep 19

LHR6:30 amLondon Heathrow

13h 25m

1 stop

SEA11:55 amSeattle/Tacoma Intl

Sep 24

SEA2:00 pmSeattle/Tacoma Intl

13h 45m

1 stop

LHR11:45 amLondon Heathrow

$611

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Fly from

Fly to

Route

Depart

Return

Price

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 11/10

5:00 pm-10:35 am

2 stops25h 35m

Seattle/Tacoma Intl

Sun 11/16

12:59 am-10:25 am

1 stop25h 26m

$606

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 10/7

3:40 pm-8:40 pm

1 stop13h 00m

Seattle/Tacoma Intl

Tue 11/11

2:35 pm-10:55 am

1 stop12h 20m

$607

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 9/22

1:25 pm-3:30 pm

Nonstop10h 05m

Seattle/Tacoma Intl

Mon 10/6

5:35 pm-11:20 am

Nonstop9h 45m

$609

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 3/10

9:25 am-12:30 pm

Nonstop10h 05m

Seattle/Tacoma Intl

Tue 3/17

7:50 pm-12:20 pm

Nonstop9h 30m

$610

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 9/22

7:45 pm-11:15 am

1 stop23h 30m

Seattle/Tacoma Intl

Mon 10/6

5:35 pm-11:20 am

Nonstop9h 45m

$613

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 12/6

6:30 am-12:10 pm

1 stop13h 40m

Seattle/Tacoma Intl

Fri 12/26

11:39 pm-6:40 am

1 stop23h 01m

$623

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 10/8

6:30 am-4:05 pm

1 stop17h 35m

Seattle/Tacoma Intl

Tue 10/14

8:25 pm-2:15 pm

Nonstop9h 50m

$624

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 11/3

6:30 am-11:45 am

1 stop13h 15m

Seattle/Tacoma Intl

Thu 3/12

5:40 pm-10:30 am

Nonstop9h 50m

$625

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sun 9/21

4:15 pm-10:59 pm

1 stop14h 44m

Seattle/Tacoma Intl

Thu 10/2

12:43 pm-9:40 am

1 stop12h 57m

$626

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 11/4

2:55 pm-4:55 pm

Nonstop10h 00m

Seattle/Tacoma Intl

Sun 11/16

6:50 pm-12:20 pm

Nonstop9h 30m

$651

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How to get the cheapest flight ticket from London to State of Washington

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to State of Washington?

The month of January is, on average, the cheapest month to fly to State of Washington from London, with most prices found around $633. If you aren’t able to travel to State of Washington during the month of January, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $660.

What is the cheapest day to depart on your flight to State of Washington?

The cheapest day to depart from London to State of Washington is on a Wednesday. Travelers who choose to depart for State of Washington on a Wednesday will often find tickets for as low as $776. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from London to State of Washington for around $1,013.

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

The cheapest time of day to fly to State of Washington is at noon when flights can be purchased for as low as $847. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $943 on average. Flights to State of Washington from London in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest London to Washington flight route?

Fly from London Heathrow to Seattle/Tacoma Intl for the best London - Washington flight prices

How far in advance should I book a flight to State of Washington?

You are more likely to see cheaper flights to State of Washington from London when booking weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $772 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to State of Washington from London for as low as $703 on momondo.

What cabin class options are available on London to Washington flights?

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

Can stopping save me money on London to State of Washington flights?

You could potentially save up to 11% on your flight if you consider stops on a London to State of Washington flight.

Cheap London to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to State of Washington

Best Price Found	$748
Fastest flight time	9h 45m
Direct flights	Every day
Airports in State of Washington	2 airports

The best one-way flight to State of Washington from London in the past 72 hours is $748. The best round-trip flight deal from London to State of Washington found on momondo in the last 72 hours is $693.

The fastest flight from London to State of Washington takes 9h 45m

Direct flights go from London to State of Washington every day.

There are 2 airports near State of Washington: Portland (PDX), Seattle/Tacoma Intl (SEA)

Search flight deals

When did momondo last update prices for flights from London to Washington?
Prices for flights from London to Washington refresh daily.
How many operators does momondo search for flights from London to Washington?
As of September 2025, there are 6 operators available to choose from for flights from London to Washington.
How old do you have to be to fly from London to Washington?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Washington.
What documentation or ID do you need to fly to Washington?
The required travel and health documents for your Washington trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from London to State of Washington?
Based on momondo bookings for flights between London and State of Washington, the leading plane model is Airbus A330-900neo, making up 24.66% of the total bookings. Other popular models include Boeing 787-10 Dreamliner with 19.90%, Boeing 787-9 Dreamliner with 17.46%, and Boeing 777-300ER with 13.70%.

Best airlines flying from London to State of Washington

Compare and see reviews for airlines that fly from London to State of Washington with momondo

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom $402	Free Cancellation	Rating 7.0 546 reviews	Search Icelandair flights
British Airways	PriceFrom $560	Free Cancellation	Rating 6.6 7,361 reviews	Search British Airways flights
Virgin Atlantic	PriceFrom $594	Free Cancellation	Rating 7.4 664 reviews	Search Virgin Atlantic flights
American Airlines	PriceFrom $620	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Delta	PriceFrom $621	Free Cancellation	Rating 7.9 7,960 reviews	Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from London to Washington?

It is quick and easy to find London to Washington flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington that suits you.

Can I find flights from London to Washington with flexible booking policies on momondo?

momondo does allow users to show only those flights to Washington from London which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from London to Washington?

Once you have performed a search for London to Washington flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from London to Washington right now. Can momondo alert me if prices change?

Price alerts on flights to Washington from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your State of Washington trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Cheap flights from London to Washington from $496

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 departing on 11/5. 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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Find the cheapest flights from London to Washington

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Icelandair flights from London to State of Washington

Our best Icelandair deals on London to State of Washington flight tickets

Lufthansa flights from London to State of Washington

Our best Lufthansa deals on London to State of Washington flight tickets

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How to get the cheapest flight ticket from London to State of Washington

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to State of Washington?

What is the cheapest day to depart on your flight to State of Washington?

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

What is the cheapest London to Washington flight route?

Fly from London Heathrow to Seattle/Tacoma Intl for the best London - Washington flight prices

How far in advance should I book a flight to State of Washington?

What cabin class options are available on London to Washington flights?

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

Can stopping save me money on London to State of Washington flights?

You could potentially save up to 11% on your flight if you consider stops on a London to State of Washington flight.

What is the cheapest airline that flies from London to Washington?

WestJet, Aer Lingus, and Iberia are the most popular carriers operating from London to Washington

What airlines fly to State of Washington?

How many flights depart from London to State of Washington on average per day?

The number of flights available between London and State of Washington is 24 per day as of September 2025. The most frequent departure time is 4:00PM, with 67% of daily flights leaving in the afternoon.

How many flights depart from London to State of Washington on average per week?

The number of flights available between London and State of Washington is 169 per week as of September 2025. The most frequent departure day is Wed, with 17% of weekly flights leaving on this day.

Cheap London to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to State of Washington

Best Price Found

Fastest flight time

Direct flights

Airports in State of Washington

When did momondo last update prices for flights from London to Washington?

How many operators does momondo search for flights from London to Washington?

How old do you have to be to fly from London to Washington?

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

What is the most popular plane model from London to State of Washington?

Best airlines flying from London to State of Washington

Compare and see reviews for airlines that fly from London to State of Washington with momondo

Why use momondo?

Why should I use momondo to find a flight deal from London to Washington?

Can I find flights from London to Washington with flexible booking policies on momondo?

How can momondo help me find flights from London to Washington?

I’m not ready to book a flight from London to Washington right now. Can momondo alert me if prices change?

An easier way to manage your State of Washington trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Washington

Popular cities in Washington

Popular flights according to clicks in the last 7 days on momondo