Cheap flights from Heathrow to Seattle

LHR — SEA
30 May — 6 Jun1
Return
1 adult
Economy
From?
To?
Mon 30/5
Mon 6/6

How to find the cheapest flight from Heathrow to Seattle

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

LHR - SEA

Price

£425 - £786

SEA

Temperature

5 - 19 °C

SEA

Rainfall

18 - 168 mm

Popular inJulyHigh demand for flights, 28% potential price rise
Cheapest inFebruaryBest time to find cheap flights, 25% potential price drop
Average price£388Average for round-trip flights in May 2022
Round-trip from£339From London Heathrow to Seattle/Tacoma Intl

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

Find a great deal and save up to 51% by booking at least 52 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from London Heathrow Airport to Seattle within the next two weeks, with the cheapest ticket starting at £494.

What is the cheapest month to fly from London Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport to Seattle (LHR - SEA)?

When flying from London Heathrow Airport to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap flights from Heathrow to Seattle in May, June 2022

The best prices found for LHR to SEA flights in May, June
15 Jun - 6 Oct
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

2 stops

32h 22m
SEA

Seattle/Tacoma Intl

LHR

London Heathrow

1 stop

14h 20m
£474

Lufthansa

View Deal

Deal found 23/5/22

6 Jun - 13 Jun
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

2 stops

34h 52m
SEA

Seattle/Tacoma Intl

LHR

London Heathrow

2 stops

40h 30m
£475

Air Canada

View Deal

Deal found 23/5/22

7 Jun - 4 Jul
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

2 stops

34h 52m
SEA

Seattle/Tacoma Intl

LHR

London Heathrow

2 stops

21h 55m
£477

Air Canada

View Deal

Deal found 24/5/22

Heathrow to Seattle 2022 flight deals

Cheap flights to Seattle from Heathrow found for this year
20 Sep - 5 Oct
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

1 stop

16h 10m
SEA

Seattle/Tacoma Intl

LHR

London Heathrow

1 stop

20h 30m
£425

Icelandair

View Deal

Deal found 24/5/22

20 Sep - 5 Oct
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

1 stop

16h 10m
SEA

Seattle/Tacoma Intl

LHR

London Heathrow

1 stop

20h 30m
£427

Icelandair

View Deal

Deal found 24/5/22

7 Sep - 28 Sep
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

1 stop

16h 10m
SEA

Seattle/Tacoma Intl

LHR

London Heathrow

1 stop

12h 05m
£432

Icelandair

View Deal

Deal found 25/5/22

Cheap Lufthansa flights from Heathrow to Seattle

10 Oct - 22 Oct
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

1 stop

14h 00m
SEA

Seattle/Tacoma Intl

LHR

London Heathrow

1 stop

12h 45m
£451

Lufthansa

View Deal

Deal found 24/5/22

19 Oct - 13 Nov
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

1 stop

14h 00m
SEA

Seattle/Tacoma Intl

LHR

London Heathrow

1 stop

12h 20m
£455

Lufthansa

View Deal

Deal found 23/5/22

16 Sep - 2 Oct
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

1 stop

17h 23m
SEA

Seattle/Tacoma Intl

LHR

London Heathrow

1 stop

14h 20m
£455

Lufthansa

View Deal

Deal found 24/5/22

  • One of the most popular airlines travelling from London Heathrow Airport to Seattle is Lufthansa. Flights from Lufthansa travelling this route typically cost £836.98 RT. This price is typically 54% cheaper than other airlines that offer London Heathrow Airport to Seattle flights. When booking this route, the cheapest RT price found was £592. The most popular departure airport in London Heathrow Airport when flying to Seattle is London Heathrow Airport. The most popular airport to fly into when visiting Seattle is Seattle/Tacoma Intl Airport. When flying from London Heathrow Airport to Seattle, Lufthansa flights are 8% more popular than any other airline flying that same route.

Cheap Air Canada flights from Heathrow to Seattle

7 Jun - 4 Jul
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

2 stops

34h 52m
SEA

Seattle/Tacoma Intl

LHR

London Heathrow

2 stops

21h 55m
£477

Air Canada

View Deal

Deal found 24/5/22

17 Sep - 30 Sep
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

2 stops

27h 58m
SEA

Seattle/Tacoma Intl

LHR

London Heathrow

2 stops

31h 00m
£478

Air Canada

View Deal

Deal found 23/5/22

1 Jun - 8 Jun
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

1 stop

16h 02m
SEA

Seattle/Tacoma Intl

LHR

London Heathrow

2 stops

29h 30m
£574

Air Canada

View Deal

Deal found 23/5/22

  • Air Canada is one of the most popular airlines used for those travelling from London Heathrow Airport to Seattle. Flights from Air Canada travelling this route typically cost £738.36 RT. This price is typically 64% more expensive than other airlines that offer London Heathrow Airport to Seattle flights. When booking this route, the cheapest RT price found was £397. The most popular departure airport in London Heathrow Airport when flying to Seattle is London Heathrow Airport. The most popular airport to fly into when visiting Seattle is Seattle/Tacoma Intl Airport. When flying from London Heathrow Airport to Seattle, Air Canada flights are 7% more popular than any other airline flying that same route.

Direct flights to Seattle from Heathrow

Save time with Heathrow to Seattle direct flight deals
12 Oct - 2 Nov
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

Nonstop

9h 45m
SEA

Seattle/Tacoma Intl

LHR

London Heathrow

Nonstop

9h 25m
£482

British Airways

View Deal

Deal found 23/5/22

7 Sep - 28 Sep
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

Nonstop

10h 20m
SEA

Seattle/Tacoma Intl

LHR

London Heathrow

Nonstop

9h 45m
£502

Virgin Atlantic

View Deal

Deal found 25/5/22

21 Jun - 5 Jul
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

Nonstop

9h 45m
SEA

Seattle/Tacoma Intl

LHR

London Heathrow

Nonstop

9h 25m
£503

Virgin Atlantic

View Deal

Deal found 23/5/22

Last-minute flights from Heathrow to Seattle

Late deals on return flights to Seattle from Heathrow, departing today and this week
2 Jun - 15 Dec
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

1 stop

11h 37m
SEA

Seattle/Tacoma Intl

LHR

London Heathrow

1 stop

12h 20m
£560

Multiple Airlines

View Deal

Deal found 25/5/22

2 Jun - 15 Dec
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

1 stop

11h 37m
SEA

Seattle/Tacoma Intl

LHR

London Heathrow

1 stop

12h 20m
£562

Lufthansa

View Deal

Deal found 25/5/22

31 May - 8 Jun
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

1 stop

31h 50m
SEA

Seattle/Tacoma Intl

LHR

London Heathrow

1 stop

17h 15m
£571

Icelandair

View Deal

Deal found 23/5/22

One-way flights to Seattle/Tacoma Intl from Heathrow

The cheapest one-way flights from Heathrow to Seattle
3 Oct
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

2 stops

29h 37m
£289

Scandinavian Airlines

View Deal

Deal found 24/5/22

28 Sep
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

2 stops

29h 37m
£297

Multiple Airlines

View Deal

Deal found 24/5/22

27 Sep
LHR

London Heathrow

SEA

Seattle/Tacoma Intl

2 stops

29h 37m
£298

Multiple Airlines

View Deal

Deal found 25/5/22

Related info for your journey

Useful info, stats and facts about Heathrow to Seattle flights.

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

If you book a flight to Seattle from London Heathrow, you will be flying to Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 17 flights from London Heathrow to Seattle/Tacoma Intl per day from 15 different airlines.

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

Some of our airline partners flying from London Heathrow 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 Heathrow Airport to Seattle for under £500 on Cheapflights?

Yes, there are multiple flights from London Heathrow Airport to Seattle for under £500. The cheapest flight booked recently is on Icelandair for just £425, but on average you can expect to pay £446.

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

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

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

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

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

According to our current data, Icelandair (£425), Lufthansa (£451), and United Airlines (£454) offers the cheapest pricing from London Heathrow Airport to Seattle. Icelandair is priced at 5% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from London Heathrow Airport to Seattle one-way?

The cheapest airline one-way is Scandinavian Airlines, with whom users have recently found tickets for as low as £289. However, be on the lookout for offers from Virgin Atlantic and WestJet, as they are both options that can get you from London Heathrow Airport to Seattle for a low price.

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

When booking a flight from London Heathrow Airport to Seattle, you may want to consider flying on American Airlines, Air Canada or Air France as they are the most popular for this route.

What are the most reliable airlines from London Heathrow Airport 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 Heathrow Airport to Seattle.

What are the cheapest flights from London Heathrow Airport to Seattle?

The cheapest flight price from London Heathrow Airport to Seattle is £436. On average you can expect to pay £1,992. The most popular route, (London Heathrow - Seattle/Tacoma Intl), can usually be booked for £425.

Alternative routes for Heathrow to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Luton to Seattlefrom £460 pp
Heathrow to Pascofrom £624 pp
Heathrow to Spokanefrom £1,756 pp

Top 5 airlines flying from Heathrow to Seattle

The chart below displays the airlines Cheapflights users travelling from Heathrow to Seattle choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
DeltaCheapest£317Average£589FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights
United AirlinesCheapest£342Average£507FlexibilityNo cancel feeOn-time69%COVID-19 safety
Search United Airlines flights
IcelandairCheapest£361Average£438FlexibilityNo cancel feeOn-time76%COVID-19 safety
Search Icelandair flights
American AirlinesCheapest£367Average£640FlexibilityNo cancel feeOn-time71%COVID-19 safety
Search American Airlines flights
Virgin AtlanticCheapest£398Average£597FlexibilityNo cancel feeOn-time72%COVID-19 safety
Search Virgin Atlantic flights

Hourly flight availability from Heathrow to Seattle

See what time of day planes typically take off from Heathrow to Seattle
1%of flight departuresEarly morningMidnight to 6 am
36%of flight departuresMorning6 am to noon
63%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Heathrow to Seattle

See how many times per day planes take to the skies headed from Heathrow to Seattle
Sunday14daily flights
Monday20daily flights
Tuesday20daily flights
Wednesday14daily flights
Thursday19daily flights
Friday19daily flights
Saturday19daily flights