How long does it take to fly to London?

If you’re flying from a popular airport in State of Washington, such as Seattle or Pasco, and flying into London, then you can expect flight times to average 9h 15m and 13h 55m, respectively.

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

JetBlue, Lufthansa, and United Airlines are the most popular carriers operating from Washington to London

What airlines fly to London?

Delta, British Airways and Virgin Atlantic are the top three most popular airlines that fly to London from State of Washington according to our data. Delta is the first choice among our users, with 35% of people opting to fly with this airline when traveling to London. Keep in mind that there are 14 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

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

The number of flights available between State of Washington and London is 97 per week as of January 2026. The most frequent departure day is Tue, with 22% of weekly flights leaving on this day.

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

The number of flights available between State of Washington and London is 13 per day as of January 2026. The most frequent departure time is 6:00PM, with 56% of daily flights leaving in the evening.

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

Prices for flights from Washington to London are refreshed on a daily basis.

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

There are 15 operators available for flights from Washington to London as of January 2026.

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

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 Washington to London.

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

The travel and health documents you'll need for your trip to London may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$233 Cheap Flights from Washington to London in 2026

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Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:40 pm - 11:55 am

SEA

LHR

12h 15m

1 stop

1:05 pm - 5:55 pm

LHR

SEA

12h 50m

1 stop

$542Icelandair

Wed, Apr 15 - Fri, Apr 24

3:35 pm - 10:55 am

SEA

LGW

12h 20m

1 stop

3:40 pm - 8:40 pm

LGW

SEA

13h 00m

1 stop

$543Icelandair

Tue, Mar 10 - Mon, Apr 13

3:35 pm - 9:20 pm

SEA

LHR

22h 45m

2 stops

6:40 am - 5:55 pm

LHR

SEA

43h 15m

2 stops

$543Multiple Airlines

Mon, Mar 16 - Sun, Mar 29

3:40 pm - 7:35 pm

SEA

STN

19h 55m

2 stops

6:30 am - 8:40 pm

STN

SEA

22h 10m

2 stops

$544Multiple Airlines

Thu, Apr 16 - Tue, Apr 21

3:40 pm - 11:55 am

SEA

LHR

12h 15m

1 stop

9:25 pm - 8:40 pm

LHR

SEA

31h 15m

1 stop

$544Icelandair

Wed, Apr 1 - Sun, Apr 12

9:50 am - 11:50 am

PDX

LHR

18h 00m

1 stop

7:40 am - 9:10 pm

LHR

PDX

20h 30m

2 stops

$596Lufthansa

Mon, Mar 2 - Wed, Mar 18

9:50 am - 10:10 am

PDX

LHR

16h 20m

2 stops

11:10 am - 12:35 am

LHR

PDX

20h 25m

2 stops

$599Lufthansa

Mon, Mar 2 - Wed, Mar 18

12:38 pm - 12:00 pm

GEG

LHR

15h 22m

1 stop

6:35 am - 9:03 pm

LHR

GEG

21h 28m

2 stops

$630United Airlines

Wed, Mar 4 - Wed, Mar 11

6:05 am - 10:30 am

GEG

LHR

20h 25m

1 stop

6:30 am - 9:05 pm

LHR

GEG

21h 35m

2 stops

$631Delta

Wed, Mar 4 - Mon, Mar 9

6:05 am - 8:50 am

PDX

LCY

19h 45m

2 stops

9:20 am - 11:10 am

LCY

PDX

33h 50m

1 stop

$655Delta

Tue, Mar 17 - Tue, Mar 31

Lufthansa flights from State of Washington to London

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

Lufthansa

Feb 26

SEA9:55 amSeattle/Tacoma Intl

16h 15m

2 stops

LHR10:10 amLondon Heathrow

Mar 8

LHR7:40 amLondon Heathrow

13h 40m

1 stop

SEA1:20 pmSeattle/Tacoma Intl

$587

Lufthansa

Feb 25

SEA9:55 amSeattle/Tacoma Intl

16h 15m

2 stops

LHR10:10 amLondon Heathrow

Mar 4

LHR6:35 amLondon Heathrow

14h 45m

1 stop

SEA1:20 pmSeattle/Tacoma Intl

$590

Lufthansa

Mar 25

SEA4:10 pmSeattle/Tacoma Intl

23h 45m

1 stop

LHR10:55 pmLondon Heathrow

Apr 1

LHR6:55 amLondon Heathrow

18h 04m

1 stop

SEA4:59 pmSeattle/Tacoma Intl

$592

United Airlines flights from State of Washington to London

Our best United Airlines deals on State of Washington to London flight tickets

United Airlines

Mar 4

GEG12:38 pmSpokane

15h 22m

1 stop

LHR12:00 pmLondon Heathrow

Mar 11

LHR6:35 amLondon Heathrow

21h 28m

2 stops

GEG9:03 pmSpokane

$630

United Airlines

Feb 24

PDX7:57 pmPortland

27h 28m

1 stop

LHR7:25 amLondon Heathrow

Mar 18

LHR2:30 pmLondon Heathrow

35h 00m

1 stop

PDX6:30 pmPortland

$634

United Airlines

Mar 5

GEG1:37 pmSpokane

12h 03m

1 stop

LHR9:40 amLondon Heathrow

Mar 8

LHR8:30 amLondon Heathrow

19h 33m

2 stops

GEG8:03 pmSpokane

$641

Fly from

Fly to

Route

Depart

Return

Price

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 4/15

3:40 pm-11:55 am

1 stop12h 15m

London Heathrow

Fri 4/24

1:05 pm-5:55 pm

1 stop12h 50m

$542

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 3/10

3:35 pm-10:55 am

1 stop12h 20m

London Gatwick

Mon 4/13

3:40 pm-8:40 pm

1 stop13h 00m

$543

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 3/16

3:35 pm-9:20 pm

2 stops22h 45m

London Heathrow

Sun 3/29

6:40 am-5:55 pm

2 stops43h 15m

$543

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Thu 4/16

3:40 pm-7:35 pm

2 stops19h 55m

London Stansted

Tue 4/21

6:30 am-8:40 pm

2 stops22h 10m

$544

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 4/1

3:40 pm-11:55 am

1 stop12h 15m

London Heathrow

Sun 4/12

9:25 pm-8:40 pm

1 stop31h 15m

$544

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 3/2

9:50 am-11:50 am

1 stop18h 00m

London Heathrow

Wed 3/18

7:40 am-9:10 pm

2 stops20h 30m

$596

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 3/2

9:50 am-10:10 am

2 stops16h 20m

London Heathrow

Wed 3/18

11:10 am-12:35 am

2 stops20h 25m

$599

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 3/4

12:38 pm-12:00 pm

1 stop15h 22m

London Heathrow

Wed 3/11

6:35 am-9:03 pm

2 stops21h 28m

$630

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 3/4

6:05 am-10:30 am

1 stop20h 25m

London Heathrow

Mon 3/9

6:30 am-9:05 pm

2 stops21h 35m

$631

PortlandLondon

PDX - LCY

PDXLCY

Portland

Tue 3/17

6:05 am-8:50 am

2 stops19h 45m

London City

Tue 3/31

9:20 am-11:10 am

1 stop33h 50m

$655

Flights are sorted by cheapest round-trip flights first.

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

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 London?

The cheapest month to fly to London from State of Washington is in October. Flight prices, which tend to average around $647, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from State of Washington averaging around $650.

What is the cheapest day to depart on your flight to London?

The cheapest day to depart from State of Washington to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $779. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $876. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

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

Flying to London from State of Washington in the evening is the least expensive time of day to depart. momondo users have found prices as low as $822 when looking at flights departing in the evening. Flights to London are more costly in the afternoon, with an average ticket price of $839. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Washington to London flight route?

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

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $783 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from State of Washington for as low as $676 on momondo.

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

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

You could potentially save up to 30% on your flight if you consider stops on a State of Washington to London flight.

Cheap State of Washington to London flight deals and tips

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

Best Price Found	$370
Fastest flight time	9h 15m
Direct flights	Every day
Airports in London	6 airports

The best one-way flight to London from State of Washington in the past 72 hours is $370. The best round-trip flight deal from State of Washington to London found on momondo in the last 72 hours is $618.

The fastest flight from State of Washington to London takes 9h 15m

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

There are 6 airports in London. From State of Washington there are direct flights to London Heathrow (LHR).

Search flight deals

When did momondo last update prices for flights from Washington to London?
Prices for flights from Washington to London are refreshed on a daily basis.
How many operators does momondo search for flights from Washington to London?
There are 15 operators available for flights from Washington to London as of January 2026.
How old do you have to be to fly from Washington to London?
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 Washington to London.
What documentation or ID do you need to fly to London?
The travel and health documents you'll need for your trip to London may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from State of Washington to London?
momondo data reveals that the most frequently booked plane model on the route from State of Washington to London is Boeing 787-9 Dreamliner, representing 25.48% of all bookings. The subsequent popular models are Boeing 787-10 Dreamliner at 24.09%, Airbus A330-200 at 19.54%, and Airbus A330-900neo at 13.84%.

Best airlines flying from State of Washington to London

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

Airline	Rating	Free Cancellation	Price
Scandinavian Airlines	PriceFrom $465	Free Cancellation	Rating 7.3 1,672 reviews	Search Scandinavian Airlines flights
Icelandair	PriceFrom $483	Free Cancellation	Rating 7.1 605 reviews	Search Icelandair flights
Aer Lingus	PriceFrom $500	Free Cancellation	Rating 7.2 1,442 reviews	Search Aer Lingus flights
American Airlines	PriceFrom $517	Free Cancellation	Rating 7.2 11,199 reviews	Search American Airlines flights
Air France	PriceFrom $532	Free Cancellation	Rating 7.4 1,528 reviews	Search Air France flights
British Airways	PriceFrom $535	Free Cancellation	Rating 6.7 7,705 reviews	Search British Airways flights
United Airlines	PriceFrom $547	Free Cancellation	Rating 7.4 9,213 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $553	Free Cancellation	Rating 8.0 11,805 reviews	Search Alaska Airlines flights
Finnair	PriceFrom $556	Free Cancellation	Rating 7.6 1,356 reviews	Search Finnair flights
Delta	PriceFrom $558	Free Cancellation	Rating 7.9 8,124 reviews	Search Delta flights

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Luton

Dover

Slough

Guildford

Crawley

Wembley

Dartford

Hayes

Brentwood

Harrow

Watford

Cobham

Folkestone

Romford

Stansted

Croydon

Richmond

Why use momondo?

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

Finding the right flight to London from Washington is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to London from Washington with this policy.

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

momondo provides multiple filters to help you find the best flight to London from Washington. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Washington and alert you when they change.

An easier way to manage your London trip

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Find better results for your trip to the United Kingdom

Cheap flights from Washington to London from $233

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to London departing on 3/9. 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 Washington to London

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Lufthansa flights from State of Washington to London

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

United Airlines flights from State of Washington to London

Our best United Airlines deals on State of Washington to London flight tickets

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

What is the cheapest month to fly to London?

What is the cheapest day to depart on your flight to London?

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

What is the cheapest Washington to London flight route?

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

How far in advance should I book a flight to London?

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

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

You could potentially save up to 30% on your flight if you consider stops on a State of Washington to London flight.

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

JetBlue, Lufthansa, and United Airlines are the most popular carriers operating from Washington to London

What airlines fly to London?

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

The number of flights available between State of Washington and London is 13 per day as of January 2026. The most frequent departure time is 6:00PM, with 56% of daily flights leaving in the evening.

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

The number of flights available between State of Washington and London is 97 per week as of January 2026. The most frequent departure day is Tue, with 22% of weekly flights leaving on this day.

How long does it take to fly to London?

If you’re flying from a popular airport in State of Washington, such as Seattle or Pasco, and flying into London, then you can expect flight times to average 9h 15m and 13h 55m, respectively.

Cheap State of Washington to London flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in London

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

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

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

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

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

Best airlines flying from State of Washington to London

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

Traveling to a place near London?

Why use momondo?

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

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

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

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

An easier way to manage your London 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 the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London