Cheap flights from Heathrow to Seattle-Tacoma International

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How to find the cheapest flight from
Heathrow (LHR) to Seattle-Tacoma International (SEA)

All the information you need to plan the best LHR to SEA flight in 2021: compare Heathrow to Seattle-Tacoma International flight prices with the expected peak season, weather and rainfall in Seattle-Tacoma International.
LHR - SEA
Price
£306 - £565

Popular in

July

High demand for flights, 28% potential price rise

Cheapest in

February

Best time to find cheap flights, 25% potential price drop

Round-trip from

£306

From Heathrow to Seattle-Tacoma International

One-way from

£35

One-way flight from Heathrow to Seattle-Tacoma International

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 Heathrow to Seattle-Tacoma International?

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 Heathrow to Seattle-Tacoma International within the next two weeks, with the cheapest ticket starting at £445.

What is the cheapest month to fly from Heathrow to Seattle-Tacoma International?

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-Tacoma International. Flights to Seattle-Tacoma International from Heathrow in February are about £393 on average during February, but can be found for as low as £259.

Cheap flights from Heathrow to Seattle-Tacoma International in August, September 2021

The best prices found for LHR to SEA flights in August, September
20 Aug - 30 Sep
£391pp
LHR
London Heathrow
Multiple airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
 
1 STOP
LHR
London Heathrow
20 Aug - 30 Sep
£393pp
LHR
London Heathrow
Multiple airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
   
2 STOPS
LHR
London Heathrow
20 Aug - 18 Nov
£406pp
LHR
London Heathrow
Multiple airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
 
1 STOP
LHR
London Heathrow

Heathrow to Seattle-Tacoma International 2021 flight deals

Cheap flights to Seattle-Tacoma International from Heathrow found for this year
7 Sep - 5 Oct
£380pp
LHR
London Heathrow
Icelandair
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Icelandair
 
1 STOP
LHR
London Heathrow
27 Oct - 4 Nov
£385pp
LHR
London Heathrow
Icelandair
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Icelandair
 
1 STOP
LHR
London Heathrow
2 Sep - 30 Sep
£391pp
LHR
London Heathrow
Multiple airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
 
1 STOP
LHR
London Heathrow

Direct flights to Seattle-Tacoma International from Heathrow

Save time with Heathrow to Seattle-Tacoma International direct flight deals
11 Jan - 17 Jan
£409pp
LHR
London Heathrow
Virgin Atlantic
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Virgin Atlantic
Direct
LHR
London Heathrow
24 Jan - 30 Jan
£413pp
LHR
London Heathrow
Virgin Atlantic
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Virgin Atlantic
Direct
LHR
London Heathrow
18 Jan - 31 Jan
£419pp
LHR
London Heathrow
Finnair
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Finnair
Direct
LHR
London Heathrow

Last-minute flights from Heathrow to Seattle-Tacoma International

Late deals on return flights to Seattle-Tacoma International from Heathrow, departing today and this week
7 Aug - 25 Aug
£516pp
LHR
London Heathrow
Lufthansa
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Lufthansa
 
1 STOP
LHR
London Heathrow
7 Aug - 27 Aug
£516pp
LHR
London Heathrow
Lufthansa
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Lufthansa
 
1 STOP
LHR
London Heathrow
11 Aug - 26 Aug
£519pp
LHR
London Heathrow
Brussels Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Brussels Airlines
   
2 STOPS
LHR
London Heathrow

One-way flights to Seattle-Tacoma International from Heathrow

The cheapest one-way flights from Heathrow to Seattle-Tacoma International
06:05 - 08:10
British Airways
Direct
10h 05m
LHR - SEA
British Airways
£35
Netflights
02:45 - 16:23
Brussels Airlines
2 stops
21h 38m
LHR - SEA
Brussels Airlines
£295
World Air Fares
10:10 - 17:27
SWISS
1 stop
15h 17m
LHR - SEA
SWISS
£318
World Air Fares

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Heathrow</span> to <span class="emphasized">Seattle-Tacoma International</span> flights.

Flight FAQs

From Heathrow to Seattle-Tacoma International

Are flight prices decreasing from Heathrow to Seattle due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Heathrow and Seattle for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

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. British Airways, Virgin Atlantic, and United Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like British Airways with this kind of flexibility.

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 centre of Seattle. There are 2 flights from London Heathrow to Seattle/Tacoma Intl per day from 17 different airlines.

Can I find flights from Heathrow to Seattle-Tacoma International for under £360 on Cheapflights?

Yes, there are multiple flights from Heathrow to Seattle-Tacoma International for under £360. The cheapest flight booked recently is on Icelandair for just £347, but on average you can expect to pay £388.

Are there direct flights from Heathrow to Seattle-Tacoma International for under £432 on Cheapflights?

Cheapflights has 20 direct flights from Heathrow to Seattle-Tacoma International under £432. A good price for a direct flight from Heathrow to Seattle-Tacoma International is less than £451.

Are there last-minute flights available from Heathrow to Seattle-Tacoma International for under £575?

There are currently 20+ open flights from Heathrow to Seattle-Tacoma International within the next 7 days for less than £575.

Does it rain more in Heathrow or Seattle?

In Heathrow, there will be greater rainfall in Heathrow compared to Seattle over the next 17 days.

Is Heathrow weather warmer or cooler than Seattle?

With an average temperature of 25 °C, peak weather can be found in July. As a traveller, expect to see changes in flight prices during that period. The temperatures in Seattle are hotter than in Heathrow.

How long does is the flight from Heathrow to Seattle-Tacoma International?

A quick flight from Heathrow to Seattle-Tacoma International can take about 9h 45m. Virgin Atlantic provides one of the quickest options available for as low as £409. Both multi-stop and direct flights can be found to your destination and back.

What are the cheapest airlines to flying from Heathrow to Seattle-Tacoma International return?

Cheapflights users have booked flights from Heathrow to Seattle-Tacoma International from £347 return. Other airlines that can offer you cheap pricing are Virgin Atlantic, from £398, and Lufthansa, from £410. Users have found that Icelandair is 14% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from Heathrow to Seattle-Tacoma International one-way?

For one-way options, check prices for British Airways. According to our data, you can fly for as low as £35. Users have also found prices from £279 and £281 on British Airways and Lufthansa, respectively.

Alternative routes for Heathrow to Seattle-Tacoma International

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

Destination information for Seattle-Tacoma International

Things to know before you go - useful duration and weather info for your trip from Heathrow to Seattle-Tacoma International.
Today's exchange rate
£1 = $1.40
Flight duration
9h 32m

Airports servicing London

Airports servicing Seattle

Top 10 airlines flying from Heathrow to Seattle-Tacoma International

The chart below displays the airlines Cheapflights users travelling from Heathrow to Seattle-Tacoma International choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Austrian Airlines
£311 £439 No cancel fee 78%
Search Austrian Airlines flights
United Airlines
£335 £535 No cancel fee 69%
Search United Airlines flights
Lufthansa
£374 £625 No cancel fee 76%
Search Lufthansa flights
Air Canada
£358 £634 No cancel fee 67%
Search Air Canada flights
SWISS
£510 £666 No cancel fee 79%
Search SWISS flights
American Airlines
£408 £667 No cancel fee 71%
Search American Airlines flights
Iberia
£402 £690 No cancel fee 77%
Search Iberia flights
KLM
£388 £697 No cancel fee 75%
Search KLM flights
Icelandair
£465 £715 No cancel fee 76%
Search Icelandair flights
Aer Lingus
£537 £738 No cancel fee N/A
Search Aer Lingus flights

Hourly flight availability from Heathrow to Seattle-Tacoma International

See what time of day planes typically take off from Heathrow towards Seattle-Tacoma International.
Afternoon Midday to 6 PM 100% of flight departures
Early morning Midnight to 6 AM 0% of flight departures
Morning 6 AM to midday 0% of flight departures
Evening 6 PM to midnight 0% of flight departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Heathrow to Seattle-Tacoma International
See how many times per day planes take to the skies headed from Heathrow to Seattle-Tacoma International.
Sunday
5 daily flights
Monday
5 daily flights
Tuesday
0 flights
Wednesday
5 daily flights
Thursday
0 flights
Friday
5 daily flights
Saturday
0 flights
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