Cheap Flights from London to Seattle from £341

How to find the cheapest flight from
London (LON) to Seattle (SEA)

All the information you need to plan the best LON to SEA flight in 2022: compare London to Seattle flight prices with the expected peak season, weather and rainfall in Seattle.

LON - SEA Price	£450 - £752
SEA Temperature	5 - 19 °C
SEA Rainfall	18 - 168 mm

Popular in July High demand for flights, 27% potential price rise
Cheapest in February Best time to find cheap flights, 18% potential price drop
Round-trip from £359 From London (LON) to Seattle/Tacoma Intl
One-way from £341 One-way flight from London (LON) to Seattle/Tacoma Intl

Popular in

July

High demand for flights, 27% potential price rise

Cheapest in

February

Best time to find cheap flights, 18% potential price drop

Round-trip from

£359

From London (LON) to Seattle/Tacoma Intl

One-way from

£341

One-way flight from London (LON) to Seattle/Tacoma Intl

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.

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

Travelers have found it’s best to book a flight 52 days in advance to save up to 51% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 52 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from London to Seattle 1-2 weeks in advance for as low as £494, or £647 for flights within the next 24 hours.

What is the cheapest day to fly round-trip from London to Seattle?

Leaving on a Monday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 8% on the overall cost on flights from London to Seattle.

What is the cheapest month to fly from London to Seattle?

Due to multiple factors, expect to potentially pay more when booking in July. For low rates, February can be a great choice for travel to Seattle. Flights to Seattle from London in February are about £436 on average during February, but can be found for as low as £287.

When is the cheapest time to fly from London to Seattle (LON - SEA)?

Unlike in the afternoon, when flights are generally more expensive, you can save up to 19% on flights from London to Seattle by exploring options for tickets in the evening.

Cheap flights from London to Seattle in May, June 2022

The best prices found for LON to SEA flights in May, June

15 Jun - 6 Oct

£475pp

LHR

London Heathrow

Lufthansa

2 STOPS

SEA

Seattle/Tacoma Intl

SEA

Seattle/Tacoma Intl

Lufthansa

1 STOP

LHR

London Heathrow

6 Jun - 13 Jun

£475pp

LHR

London Heathrow

Air Canada

2 STOPS

SEA

Seattle/Tacoma Intl

SEA

Seattle/Tacoma Intl

Air Canada

2 STOPS

LHR

London Heathrow

7 Jun - 4 Jul

£477pp

LHR

London Heathrow

Air Canada

2 STOPS

SEA

Seattle/Tacoma Intl

SEA

Seattle/Tacoma Intl

Air Canada

2 STOPS

LHR

London Heathrow

London to Seattle 2022 flight deals

Cheap flights to Seattle from London found for this year

20 Sep - 5 Oct

£425pp

LHR

London Heathrow

Icelandair

1 STOP

SEA

Seattle/Tacoma Intl

SEA

Seattle/Tacoma Intl

Icelandair

1 STOP

LHR

London Heathrow

20 Sep - 5 Oct

£428pp

LHR

London Heathrow

Icelandair

1 STOP

SEA

Seattle/Tacoma Intl

SEA

Seattle/Tacoma Intl

Icelandair

1 STOP

LHR

London Heathrow

12 Oct - 2 Nov

£428pp

LGW

London Gatwick

Icelandair

1 STOP

SEA

Seattle/Tacoma Intl

SEA

Seattle/Tacoma Intl

Icelandair

1 STOP

LGW

London Gatwick

Direct flights to Seattle from London

Save time with London to Seattle direct flight deals

12 Oct - 2 Nov

£482pp

LHR

London Heathrow

British Airways

Direct

SEA

Seattle/Tacoma Intl

SEA

Seattle/Tacoma Intl

British Airways

Direct

LHR

London Heathrow

7 Sep - 28 Sep

£502pp

LHR

London Heathrow

Virgin Atlantic

Direct

SEA

Seattle/Tacoma Intl

SEA

Seattle/Tacoma Intl

Virgin Atlantic

Direct

LHR

London Heathrow

21 Jun - 5 Jul

£503pp

LHR

London Heathrow

Virgin Atlantic

Direct

SEA

Seattle/Tacoma Intl

SEA

Seattle/Tacoma Intl

Virgin Atlantic

Direct

LHR

London Heathrow

Last-minute flights from London to Seattle

Late deals on return flights to Seattle from London, departing today and this week

2 Jun - 15 Dec

£560pp

LHR

London Heathrow

Multiple airlines

1 STOP

SEA

Seattle/Tacoma Intl

SEA

Seattle/Tacoma Intl

Lufthansa

1 STOP

LHR

London Heathrow

2 Jun - 15 Dec

£562pp

LHR

London Heathrow

Lufthansa

1 STOP

SEA

Seattle/Tacoma Intl

SEA

Seattle/Tacoma Intl

Lufthansa

1 STOP

LHR

London Heathrow

31 May - 8 Jun

£571pp

LHR

London Heathrow

Icelandair

1 STOP

SEA

Seattle/Tacoma Intl

SEA

Seattle/Tacoma Intl

Icelandair

1 STOP

LHR

London Heathrow

One-way flights to Seattle/Tacoma Intl from London

The cheapest one-way flights from London to Seattle

15:40 - 07:55

Multiple Airlines

2 stops

24h 15m

STN - SEA

£341

Combigo

15:30 - 19:53

Scandinavian Airlines

2 stops

36h 23m

LHR - SEA

£349

ScholarTrip

Related info for your journey

Useful info, stats and facts about <span class="emphasized">London</span> to <span class="emphasized">Seattle</span> flights.

Flight FAQs

From London to Seattle

What airport do you fly into for flights to Seattle from London?

Located just 11.4 mi from the city center, Seattle/Tacoma Intl is the airport most travelers will use when flying to Seattle from London. Booking flights from London to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 17 daily inbound flights from London from 16 different airlines.

Which airlines flying from London to Seattle/Tacoma Intl have flexible cancellations due to COVID-19?

Some of our airline partners flying from London to Seattle/Tacoma Intl have new flexible policies in place due to COVID-19. Virgin Atlantic, British Airways, and Finnair are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like Virgin Atlantic with this kind of flexibility.

Can I find flights from London to Seattle for under £500 on Cheapflights?

Yes, there are multiple flights from London to Seattle for under £500. The cheapest flight booked recently is on Icelandair for just £425, but on average you can expect to pay £440.

Are there nonstop flights from London to Seattle for under £500 on Cheapflights?

Cheapflights has at least 20 direct flights from London to Seattle under £500. A good price for a nonstop flight from London to Seattle is less than £523.

Are there last-minute flights available from London to Seattle for under £600?

There are currently 20+ open flights from London to Seattle within the next 7 days for less than £600.

What are the cheapest airlines flying from London to Seattle round-trip?

Icelandair, at £425, was found to be the cheapest airline from London to Seattle.Alternate airlines to your destination round-trip include Lufthansa and United Airlines. Icelandair is priced at 2% lower than the current average price of a flight leaving 3 months from now.

What are the most popular airlines that fly from London to Seattle?

Before booking your flight from London to Seattle check out the most popular airlines for this route: American Airlines, Air Canada or Air France.

What are the cheapest flights from London to Seattle?

On average you can expect to pay £1,993 for a flight from London to Seattle. The cheapest flight overall is £436 while the most popular route, (London Heathrow - Seattle/Tacoma Intl) is currently priced at £425.

What are the most popular routes from London to Seattle?

When deciding which route to take from London to Seattle consider London Heathrow - Seattle/Tacoma Intl, London Gatwick - Seattle/Tacoma Intl or London City - Seattle/Tacoma Intl as they are the most popular.

What are the most reliable airlines from London to Seattle?

Consider Alaska Airlines (91%), American Airlines (75%) or Finnair (75%) when booking your flight. These represent the most reliable airlines when flying from London to Seattle.

COVID Restrictions

View COVID Travel Restrictions for Seattle, WA

Do I need a COVID test to fly to Seattle from London?

Information is based on travel restrictions from London to Seattle/Tacoma Intl

Most visitors from London need to provide a negative COVID-19 test result and/or quarantine to enter Seattle/Tacoma Intl.

COVID-19 testing requirements
Visitors from London must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Seattle/Tacoma Intl.

Quarantine requirements
Visitors from London are not required to quarantine after entering Seattle/Tacoma Intl.

Do I need a test to fly back to London from Seattle?

Returning to London from Seattle/Tacoma Intl

COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl are not required to present a negative COVID-19 PCR test or antigen result upon entering London.

Quarantine requirements
Visitors from Seattle/Tacoma Intl are not required to quarantine after entering London.

Hide COVID Travel Restrictions for Seattle, WA

Alternative routes for London to Seattle

See prices for flight routes from nearby airports that may be better suited for you.

Birmingham to Spokane from £1,156 pp

Destination information for Seattle

Things to know before you go - useful duration and weather info for your trip from London to Seattle.

£1 = $1.26

19.0 °C

45.0 mm

Airports servicing London

Heathrow (LHR)

Gatwick (LGW)

Stansted (STN)

London City (LCY)

Luton (LTN)

Southend (SEN)

Airports servicing Seattle

Seattle (SEA)

Airline	Cheapest	Average	Flexibility	On-time
Norwegian Air UK	£308	£564	No cancel fee	N/A	Search Norwegian Air UK flights
Delta	£317	£661	No cancel fee	N/A	Search Delta flights
Norwegian	£340	£464	No cancel fee	74%	Search Norwegian flights
United Airlines	£342	£507	No cancel fee	69%	Search United Airlines flights
Icelandair	£361	£496	No cancel fee	76%	Search Icelandair flights
American Airlines	£367	£640	No cancel fee	71%	Search American Airlines flights
Virgin Atlantic	£398	£597	No cancel fee	72%	Search Virgin Atlantic flights
Lufthansa	£406	£539	No cancel fee	76%	Search Lufthansa flights
KLM	£410	£604	No cancel fee	75%	Search KLM flights
Air Canada	£416	£535	No cancel fee	67%	Search Air Canada flights

Hourly flight availability from London to Seattle

See what time of day planes typically take off from London towards Seattle.

Afternoon Midday to 6 PM	63% of flight departures
Morning 6 AM to midday	36% of flight departures
Early morning Midnight to 6 AM	1% of flight departures
Evening 6 PM to midnight	0% of flight departures

Midnight

6 AM

Noon

6 PM

Weekly flight availability

from London to Seattle

See how many times per day planes take to the skies headed from London to Seattle.

Sunday

14 daily flights

Monday

20 daily flights

Tuesday

20 daily flights

Wednesday

14 daily flights

Thursday

19 daily flights

Friday

19 daily flights

Saturday

19 daily flights

Cheap flights from London to Seattle

The best prices from London to Seattle/Tacoma Intl are usually found in February or March, booked 54 days in advance, depart on a Tuesday or Monday and return on a Tuesday

How to find the cheapest flight from London (LON) to Seattle (SEA)

All the information you need to plan the best LON to SEA flight in 2022: compare London to Seattle flight prices with the expected peak season, weather and rainfall in Seattle.

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

What is the cheapest day to fly round-trip from London to Seattle?

What is the cheapest month to fly from London to Seattle?

When is the cheapest time to fly from London to Seattle (LON - SEA)?

Cheap flights from London to Seattle in May, June 2022

The best prices found for LON to SEA flights in May, June

London to Seattle 2022 flight deals

Cheap flights to Seattle from London found for this year

Direct flights to Seattle from London

Save time with London to Seattle direct flight deals

Last-minute flights from London to Seattle

Late deals on return flights to Seattle from London, departing today and this week

One-way flights to Seattle/Tacoma Intl from London

The cheapest one-way flights from London to Seattle

Related info for your journey

Useful info, stats and facts about <span class="emphasized">London</span> to <span class="emphasized">Seattle</span> flights.

Flight FAQs

From London to Seattle

What airport do you fly into for flights to Seattle from London?

Which airlines flying from London to Seattle/Tacoma Intl have flexible cancellations due to COVID-19?

Can I find flights from London to Seattle for under £500 on Cheapflights?

Are there nonstop flights from London to Seattle for under £500 on Cheapflights?

Are there last-minute flights available from London to Seattle for under £600?

What are the cheapest airlines flying from London to Seattle round-trip?

What are the most popular airlines that fly from London to Seattle?

What are the cheapest flights from London to Seattle?

What are the most popular routes from London to Seattle?

What are the most reliable airlines from London to Seattle?

Related searches

Flights to Seattle (SEA) from London

Other flights from London

Other flights to Seattle

Hire a Car

COVID Restrictions

Do I need a COVID test to fly to Seattle from London?

Do I need a test to fly back to London from Seattle?

Alternative routes for London to Seattle

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for Seattle

Things to know before you go - useful duration and weather info for your trip from London to Seattle.

Airports servicing London

Airports servicing Seattle

Top 10 airlines flying from London to Seattle/Tacoma Intl

The chart below displays the airlines Cheapflights users travelling from London to Seattle choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2022.

Hourly flight availability from London to Seattle

See what time of day planes typically take off from London towards Seattle.

See how many times per day planes take to the skies headed from London to Seattle.

How to find the cheapest flight from
London (LON) to Seattle (SEA)