What is the cheapest airline that flies from United Kingdom to Washington?

Finnair, Aer Lingus, and WestJet are the most popular carriers operating from United Kingdom to Washington

What airlines fly to State of Washington?

British Airways, Delta and Icelandair are the top three most popular airlines that fly to State of Washington from United Kingdom according to our data. British Airways is the first choice among our users, with 47% 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.

How long is the flight from United Kingdom to State of Washington?

If you’re flying from a popular airport in United Kingdom, such as London or Manchester, and flying into State of Washington, then you can expect flight times to average 11h 30m and 13h 05m, respectively.

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

Prices for flights from United Kingdom to Washington are updated daily.

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

There are 6 operators available for flights from United Kingdom to Washington as of September 2025.

How old do you have to be to fly from United Kingdom to Washington?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from United Kingdom to Washington.

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

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

$443 Cheap Flights from the United Kingdom to Washington in 2025/26

Q: How many flights depart from United Kingdom to State of Washington on average per day?

The number of flights available between United Kingdom and State of Washington is 26 per day as of September 2025. The most frequent departure time is 4:00PM, with 67% of daily flights leaving in the afternoon.

Q: How many flights depart from United Kingdom to State of Washington on average per week?

As of September 2025, 185 flights take off from United Kingdom and land in State of Washington each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from the United Kingdom to Washington

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from the United Kingdom to Washington

9:45 am - 8:46 pmLHR-SEA

19h 01m2 stops

12:34 am - 10:30 amSEA-LHR

25h 56m1 stop

$604Finnair

Find Deal

Wed, Oct 8 - Mon, Oct 13

3:40 pm - 8:40 pmLGW-SEA

13h 00m1 stop

2:35 pm - 10:55 amSEA-LGW

12h 20m1 stop

$605Icelandair

Find Deal

Tue, Oct 7 - Tue, Nov 11

2:55 pm - 5:55 pmLHR-SEA

10h 00mnonstop

2:25 pm - 7:00 amSEA-LHR

9h 35mnonstop

$608British Airways

Find Deal

Tue, Mar 10 - Tue, Mar 17

2:55 pm - 5:55 pmLHR-SEA

10h 00mnonstop

2:25 pm - 7:00 amSEA-LHR

9h 35mnonstop

$610British Airways

Find Deal

Tue, Mar 10 - Tue, Mar 17

5:25 pm - 7:50 pmLHR-SEA

10h 25mnonstop

5:35 pm - 11:20 amSEA-LHR

9h 45mnonstop

$614Virgin Atlantic

Find Deal

Wed, Oct 8 - Tue, Oct 14

2:45 pm - 5:50 pmLHR-SEA

10h 05mnonstop

7:20 pm - 12:50 pmSEA-LHR

9h 30mnonstop

$617Virgin Atlantic

Find Deal

Tue, Oct 28 - Tue, Nov 4

6:30 am - 11:50 amLHR-SEA

13h 20m1 stop

5:35 pm - 11:20 amSEA-LHR

9h 45mnonstop

$621Delta

Find Deal

Wed, Oct 8 - Wed, Oct 22

9:55 am - 4:05 pmLHR-SEA

14h 10m1 stop

4:48 pm - 10:30 amSEA-LHR

9h 42mnonstop

$623Delta

Find Deal

Tue, Oct 7 - Tue, Nov 11

2:55 pm - 4:55 pmLHR-SEA

10h 00mnonstop

2:05 pm - 12:15 pmSEA-LHR

14h 10m1 stop

$627American Airlines

Find Deal

Tue, Dec 2 - Mon, Jan 19

11:00 am - 11:38 pmLHR-SEA

20h 38m1 stop

6:50 pm - 12:20 pmSEA-LHR

9h 30mnonstop

$633American Airlines

Find Deal

Wed, Dec 3 - Tue, Jan 20

Icelandair flights from United Kingdom to State of Washington

Our best Icelandair deals on United Kingdom 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

$605

Find similar

Icelandair

Oct 20

LGW3:40 pmLondon Gatwick

34h 10m

1 stop

SEA5:50 pmSeattle/Tacoma Intl

Oct 27

SEA3:35 pmSeattle/Tacoma Intl

12h 20m

1 stop

LGW10:55 amLondon Gatwick

$609

Find similar

Icelandair

Oct 21

LHR9:25 pmLondon Heathrow

31h 15m

1 stop

SEA8:40 pmSeattle/Tacoma Intl

Oct 28

SEA3:35 pmSeattle/Tacoma Intl

12h 15m

1 stop

LHR10:50 amLondon Heathrow

$613

Find similar

Finnair flights from United Kingdom to State of Washington

Our best Finnair deals on United Kingdom to State of Washington flight tickets

Finnair

Oct 8

LHR9:45 amLondon Heathrow

19h 01m

2 stops

SEA8:46 pmSeattle/Tacoma Intl

Oct 13

SEA12:34 amSeattle/Tacoma Intl

25h 56m

1 stop

LHR10:30 amLondon Heathrow

$604

Find similar

Finnair

Nov 6

LHR5:00 pmLondon Heathrow

25h 35m

2 stops

SEA10:35 amSeattle/Tacoma Intl

Nov 12

SEA12:59 amSeattle/Tacoma Intl

25h 26m

1 stop

LHR10:25 amLondon Heathrow

$643

Find similar

Finnair

Oct 8

LHR9:45 amLondon Heathrow

19h 01m

2 stops

SEA8:46 pmSeattle/Tacoma Intl

Oct 11

SEA11:56 pmSeattle/Tacoma Intl

25h 09m

1 stop

LHR9:05 amLondon Heathrow

$644

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from the United Kingdom to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 10/8

9:45 am-8:46 pm

2 stops19h 01m

Seattle/Tacoma Intl

Mon 10/13

12:34 am-10:30 am

1 stop25h 56m

$604

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

$605

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 3/10

2:55 pm-5:55 pm

Nonstop10h 00m

Seattle/Tacoma Intl

Tue 3/17

2:25 pm-7:00 am

Nonstop9h 35m

$608

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 3/10

2:55 pm-5:55 pm

Nonstop10h 00m

Seattle/Tacoma Intl

Tue 3/17

2:25 pm-7:00 am

Nonstop9h 35m

$610

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 10/8

5:25 pm-7:50 pm

Nonstop10h 25m

Seattle/Tacoma Intl

Tue 10/14

5:35 pm-11:20 am

Nonstop9h 45m

$614

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 10/28

2:45 pm-5:50 pm

Nonstop10h 05m

Seattle/Tacoma Intl

Tue 11/4

7:20 pm-12:50 pm

Nonstop9h 30m

$617

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 10/8

6:30 am-11:50 am

1 stop13h 20m

Seattle/Tacoma Intl

Wed 10/22

5:35 pm-11:20 am

Nonstop9h 45m

$621

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 10/7

9:55 am-4:05 pm

1 stop14h 10m

Seattle/Tacoma Intl

Tue 11/11

4:48 pm-10:30 am

Nonstop9h 42m

$623

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 12/2

2:55 pm-4:55 pm

Nonstop10h 00m

Seattle/Tacoma Intl

Mon 1/19

2:05 pm-12:15 pm

1 stop14h 10m

$627

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 12/3

11:00 am-11:38 pm

1 stop20h 38m

Seattle/Tacoma Intl

Tue 1/20

6:50 pm-12:20 pm

Nonstop9h 30m

$633

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from United Kingdom 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 United Kingdom, with most prices found around $637. If you aren’t able to travel to State of Washington during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $661.

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

The cheapest day to depart from United Kingdom 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 $780. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from United Kingdom to State of Washington for around $1,018.

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 $843. 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 United Kingdom in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest United Kingdom to Washington flight route?

Fly from London Heathrow to Seattle/Tacoma Intl for the best United Kingdom - 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 United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $768 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 United Kingdom for as low as $694 on momondo.

What cabin class options are available on United Kingdom to Washington flights?

There are 4 cabin classes available to choose from on United Kingdom 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 United Kingdom to State of Washington flights?

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

Cheap United Kingdom to State of Washington flight deals and tips

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

Best Price Found	$705
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 United Kingdom in the past 72 hours is $705. The best round-trip flight deal from United Kingdom to State of Washington found on momondo in the last 72 hours is $711.

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

Direct flights go from United Kingdom 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 United Kingdom to Washington?
Prices for flights from United Kingdom to Washington are updated daily.
How many operators does momondo search for flights from United Kingdom to Washington?
There are 6 operators available for flights from United Kingdom to Washington as of September 2025.
How old do you have to be to fly from United Kingdom to Washington?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from United Kingdom to Washington.
What documentation or ID do you need to fly to Washington?
The travel and health documents required for your trip to Washington 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. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from United Kingdom to State of Washington?
momondo data reveals that the most frequently booked plane model on the route from United Kingdom to State of Washington is Airbus A330-900neo, representing 24.34% of all bookings. The subsequent popular models are Boeing 787-10 Dreamliner at 20.53%, Boeing 787-9 Dreamliner at 18.93%, and Boeing 777-300ER at 12.94%.

Best airlines flying from United Kingdom to State of Washington

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

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom $418	Free Cancellation	Rating 7.0 545 reviews	Search Icelandair flights
British Airways	PriceFrom $421	Free Cancellation	Rating 6.7 7,386 reviews	Search British Airways flights
American Airlines	PriceFrom $589	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Virgin Atlantic	PriceFrom $594	Free Cancellation	Rating 7.4 664 reviews	Search Virgin Atlantic flights
Delta	PriceFrom $621	Free Cancellation	Rating 7.9 7,971 reviews	Search Delta flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from United Kingdom to Washington for you.

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

Yes. All flights to Washington from United Kingdom on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from United Kingdom to Washington?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Washington from United Kingdom.

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

Price alerts on flights to Washington from United Kingdom 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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Wed 10/22

Wed 10/29

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Washington

Popular cities in Washington

Flights to New Yorkfrom $50

Flights to Los Angelesfrom $44

Flights to Miamifrom $49

Flights to Chicagofrom $60

Flights to Orlandofrom $56

Flights to Las Vegasfrom $44

Flights to San Franciscofrom $60

Flights to Washington, D.C.from $56

Flights to Bostonfrom $67

Flights to Atlantafrom $51

Flights to Dallasfrom $59

Flights to Seattlefrom $102

Cheap flights from the United Kingdom to Washington from $443

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United Kingdom to Washington departing on 11/19. 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 and deals

Big names and 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 the United Kingdom to Washington

Recent round-trip flight deals from the United Kingdom to Washington

Recent one-way flight deals from the United Kingdom to Washington

Recent last minute flight deals from the United Kingdom to Washington

Recent direct flight deals from the United Kingdom to Washington

Icelandair flights from United Kingdom to State of Washington

Our best Icelandair deals on United Kingdom to State of Washington flight tickets

Finnair flights from United Kingdom to State of Washington

Our best Finnair deals on United Kingdom to State of Washington flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from the United Kingdom to Washington that are best for you.

See travel insights to Washington from

How to get the cheapest flight ticket from United Kingdom 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 United Kingdom to Washington flight route?

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

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

What cabin class options are available on United Kingdom to Washington flights?

There are 4 cabin classes available to choose from on United Kingdom 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 United Kingdom to State of Washington flights?

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

What is the cheapest airline that flies from United Kingdom to Washington?

Finnair, Aer Lingus, and WestJet are the most popular carriers operating from United Kingdom to Washington

What airlines fly to State of Washington?

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

The number of flights available between United Kingdom and State of Washington is 26 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 United Kingdom to State of Washington on average per week?

As of September 2025, 185 flights take off from United Kingdom and land in State of Washington each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.

How long is the flight from United Kingdom to State of Washington?

If you’re flying from a popular airport in United Kingdom, such as London or Manchester, and flying into State of Washington, then you can expect flight times to average 11h 30m and 13h 05m, respectively.

Cheap United Kingdom to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United Kingdom 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 United Kingdom to Washington?

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

How old do you have to be to fly from United Kingdom to Washington?

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

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

Best airlines flying from United Kingdom to State of Washington

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

Why use momondo?

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

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

How can momondo help me find flights from United Kingdom to Washington?

I’m not ready to book a flight from United Kingdom 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