How long does it take to fly to London?

Flight times from State of Washington to London vary, but if you’re flying out of Seattle and flying into London Heathrow Airport (one of the most popular routes), then the duration is 9h 15m on average. Another popular route from State of Washington to London is flying from Pasco to London Heathrow Airport, which will take roughly 12h 55m. Keep in mind that layovers or delays could extend your travel time.

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 16 per day as of December 2025. The most frequent departure time is 18:00, with 51% of daily flights leaving in the afternoon.

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

Icelandair, Lufthansa, and Austrian Airlines are the most popular carriers operating from Washington to London

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 115 per week as of December 2025. The most frequent departure day is Fri, with 22% of weekly flights leaving on this day.

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

Prices for flights from Washington to London were last updated today.

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

As of December 2025, there are 4 operators available to choose from for flights from Washington to London.

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

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 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.

£218 Cheap Flights from Washington to London in 2025/26

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14:35 - 10:50

SEA

LHR

12h 15m1 stop

12:15 - 17:00

LHR

SEA

12h 45m1 stop

£433Icelandair

lör, 10 jan - fre, 23 jan

14:10 - 11:15

SEA

LHR

13h 05m1 stop

06:30 - 12:10

LHR

SEA

13h 40m1 stop

£434Lufthansa

tors, 8 jan - tors, 15 jan

14:35 - 19:30

SEA

LHR

20h 55m1 stop

20:35 - 17:00

LHR

SEA

28h 25m1 stop

£435Icelandair

fre, 9 jan - mån, 19 jan

18:50 - 23:20

SEA

STN

20h 30m2 stops

18:00 - 12:20

STN

SEA

26h 20m2 stops

£435Multiple Airlines

ons, 8 apr - tis, 14 apr

07:00 - 07:55

SEA

LHR

16h 55m1 stop

07:40 - 13:20

LHR

SEA

13h 40m1 stop

£436Multiple Airlines

fre, 13 feb - ons, 18 feb

13:02 - 21:40

PDX

LHR

24h 38m2 stops

10:20 - 22:24

LHR

PDX

20h 04m2 stops

£449Scandinavian Airlines

sön, 8 feb - lör, 21 feb

13:02 - 21:35

PDX

LHR

24h 33m3 stops

10:20 - 22:24

LHR

PDX

20h 04m2 stops

£451Scandinavian Airlines

sön, 8 feb - lör, 21 feb

07:00 - 05:55

PDX

LHR

14h 55m1 stop

10:25 - 18:56

LHR

PDX

16h 31m1 stop

£455Brussels Airlines

ons, 14 jan - fre, 23 jan

10:47 - 17:50

PDX

LGW

23h 03m2 stops

18:40 - 22:32

LGW

PDX

35h 52m2 stops

£473SWISS

tis, 20 jan - ons, 28 jan

10:47 - 17:50

PDX

LGW

47h 03m2 stops

18:40 - 22:32

LGW

PDX

35h 52m2 stops

£476SWISS

sön, 18 jan - ons, 28 jan

Icelandair flights from State of Washington to London

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

Icelandair

10 Jan

SEA14:35Seattle/Tacoma Intl

12h 15m

1 stop

LHR10:50London Heathrow

23 Jan

LHR12:15London Heathrow

12h 45m

1 stop

SEA17:00Seattle/Tacoma Intl

£433

Find similar

Icelandair

9 Jan

SEA14:35Seattle/Tacoma Intl

20h 55m

1 stop

LHR19:30London Heathrow

19 Jan

LHR20:35London Heathrow

28h 25m

1 stop

SEA17:00Seattle/Tacoma Intl

£435

Find similar

Icelandair

12 May

SEA15:40Seattle/Tacoma Intl

15h 00m

1 stop

LGW14:40London Gatwick

28 May

LGW15:40London Gatwick

13h 00m

1 stop

SEA20:40Seattle/Tacoma Intl

£437

Find similar

Lufthansa flights from State of Washington to London

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

Lufthansa

8 Jan

SEA14:10Seattle/Tacoma Intl

13h 05m

1 stop

LHR11:15London Heathrow

15 Jan

LHR06:30London Heathrow

13h 40m

1 stop

SEA12:10Seattle/Tacoma Intl

£434

Find similar

Lufthansa

21 Jan

SEA09:55Seattle/Tacoma Intl

16h 15m

2 stops

LHR10:10London Heathrow

25 Jan

LHR07:40London Heathrow

13h 40m

1 stop

SEA13:20Seattle/Tacoma Intl

£435

Find similar

Lufthansa

13 Feb

SEA07:00Seattle/Tacoma Intl

16h 55m

1 stop

LHR07:55London Heathrow

1 Mar

LHR07:40London Heathrow

13h 40m

1 stop

SEA13:20Seattle/Tacoma Intl

£438

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

lör 10/1

14:35-10:50

1 stop12h 15m

London Heathrow

fre 23/1

12:15-17:00

1 stop12h 45m

£433

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

tors 8/1

14:10-11:15

1 stop13h 05m

London Heathrow

tors 15/1

06:30-12:10

1 stop13h 40m

£434

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

fre 9/1

14:35-19:30

1 stop20h 55m

London Heathrow

mån 19/1

20:35-17:00

1 stop28h 25m

£435

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

ons 8/4

18:50-23:20

2 stops20h 30m

London Stansted

tis 14/4

18:00-12:20

2 stops26h 20m

£435

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

fre 13/2

07:00-07:55

1 stop16h 55m

London Heathrow

ons 18/2

07:40-13:20

1 stop13h 40m

£436

PortlandLondon

PDX - LHR

PDXLHR

Portland

sön 8/2

13:02-21:40

2 stops24h 38m

London Heathrow

lör 21/2

10:20-22:24

2 stops20h 04m

£449

PortlandLondon

PDX - LHR

PDXLHR

Portland

sön 8/2

13:02-21:35

3 stops24h 33m

London Heathrow

lör 21/2

10:20-22:24

2 stops20h 04m

£451

PortlandLondon

PDX - LHR

PDXLHR

Portland

ons 14/1

07:00-05:55

1 stop14h 55m

London Heathrow

fre 23/1

10:25-18:56

1 stop16h 31m

£455

PortlandLondon

PDX - LGW

PDXLGW

Portland

tis 20/1

10:47-17:50

2 stops23h 03m

London Gatwick

ons 28/1

18:40-22:32

2 stops35h 52m

£473

PortlandLondon

PDX - LGW

PDXLGW

Portland

sön 18/1

10:47-17:50

2 stops47h 03m

London Gatwick

ons 28/1

18:40-22:32

2 stops35h 52m

£476

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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 November. Flight prices, which tend to average around £482, are often lower during this time because this is during the off-season. The month of October is another great option to travel to London, with average flight prices from State of Washington averaging around £483.

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

Our data shows that Tuesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £514. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from State of Washington to London for around £656.

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

The cheapest time of day to fly to London is at midday when flights can be purchased for as low as £543. Flights in the morning are often more expensive, with an average ticket price of £1,022.

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 £594 when searching weeks before you fly. 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 £517 on momondo.

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

There are 3 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 25% 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	£325
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 £325. The best return flight deal from State of Washington to London found on momondo in the last 72 hours is £825.

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 were last updated today.
How many operators does momondo search for flights from Washington to London?
As of December 2025, there are 4 operators available to choose from for flights from Washington to London.
How old do you have to be to fly from Washington to London?
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 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 787-10 Dreamliner, representing 26.46% of all bookings. The subsequent popular models are Boeing 787-9 Dreamliner at 23.21%, Airbus A330-200 at 20.81%, and Airbus A330-900neo at 8.78%.

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
British Airways	PriceFrom £354	Free Cancellation	Rating 6.7 7,571 reviews		Search British Airways flights
Virgin Atlantic	PriceFrom £369	Free Cancellation	Rating 7.5 675 reviews		Search Virgin Atlantic flights

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Hayes

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Dover

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Colchester

Bedford

Ramsgate

Hounslow

Stansted

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington to London . Millions of users trust and use momondo every year so you are in good hands.

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

All flight searches from Washington to London on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search for Washington to London 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 Washington to London right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Washington to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.

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Cheap flights from Washington to London from £218

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 31/1. 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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Icelandair flights from State of Washington to London

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

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Our best Lufthansa 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?

Our data shows that Tuesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £514. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from State of Washington to London for around £656.

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

The cheapest time of day to fly to London is at midday when flights can be purchased for as low as £543. Flights in the morning are often more expensive, with an average ticket price of £1,022.

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 3 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 25% 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?

Icelandair, Lufthansa, and Austrian Airlines are the most popular carriers operating from Washington 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 16 per day as of December 2025. The most frequent departure time is 18:00, with 51% of daily flights leaving in the afternoon.

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 115 per week as of December 2025. The most frequent departure day is Fri, with 22% of weekly flights leaving on this day.

How long does it take to fly to London?

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

Travelling 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, organise 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