Cheap flights from Heathrow to Seattle-Tacoma International

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The best prices from Heathrow to Seattle-Tacoma International are usually found in February or October, booked 56 days in advance, depart on a Tuesday or Thursday and return on a Monday

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

LHR - SEA
Price
£301 - £556

Popular in

July

High demand for flights, 28% potential price rise

Cheapest in

February

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

Average price

£301

Average for round-trip flights in February 2021

Round-trip from

£301

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.
What is the cheapest day to fly return from Heathrow to Seattle-Tacoma International?

Users have found that flying from Heathrow to Seattle-Tacoma International on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

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 £438.

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 £387 on average during February, but can be found for as low as £255.

When is the cheapest time to fly from Heathrow to Seattle-Tacoma International (LHR - SEA)?

It’s typically best to fly out from Heathrow to Seattle-Tacoma International in the evening. Doing so could potentially save you 28% on the flight price compared to flying in the afternoon, which is usually more expensive.

Cheap flights from Heathrow to Seattle-Tacoma International in February, March 2021

30 Mar - 15 Apr
£392pp
LHR
London Heathrow
Icelandair
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Icelandair
 
1 STOP
LHR
London Heathrow
28 Mar - 16 Apr
£398pp
LHR
London Heathrow
Icelandair
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Icelandair
 
1 STOP
LHR
London Heathrow
24 Mar - 28 Mar
£400pp
LHR
London Heathrow
Virgin Atlantic
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Virgin Atlantic
 
1 STOP
LHR
London Heathrow

Heathrow to Seattle-Tacoma International 2021 flight deals

4 Jun - 19 Jun
£378pp
LHR
London Heathrow
Air Canada
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
   
2 STOPS
LHR
London Heathrow
19 May - 26 May
£380pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Multiple Airlines
   
2 STOPS
LHR
London Heathrow
2 Aug - 15 Aug
£387pp
LHR
London Heathrow
Multiple airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
   
2 STOPS
LHR
London Heathrow

Direct flights to Seattle-Tacoma International from Heathrow

19 May - 26 May
£416pp
LHR
London Heathrow
Virgin Atlantic
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Virgin Atlantic
Direct
LHR
London Heathrow
26 May - 16 Jun
£434pp
LHR
London Heathrow
Virgin Atlantic
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Virgin Atlantic
Direct
LHR
London Heathrow
10 May - 18 May
£437pp
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

7 Mar - 9 Sep
£435pp
LHR
London Heathrow
Lufthansa
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Lufthansa
 
1 STOP
LHR
London Heathrow
7 Mar - 7 Sep
£445pp
LHR
London Heathrow
Lufthansa
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Lufthansa
 
1 STOP
LHR
London Heathrow
7 Mar - 8 Sep
£460pp
LHR
London Heathrow
Austrian Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Austrian Airlines
 
1 STOP
LHR
London Heathrow

One-way flights to Seattle-Tacoma International from Heathrow

10:25 - 13:25
British Airways
Direct
10h 00m
LHR - SEA
British Airways
02:30 - 16:25
Virgin Atlantic
2 stops
20h 55m
LHR - SEA
Virgin Atlantic
£294
Travelgenio
04:40 - 17:29
SWISS
2 stops
20h 49m
LHR - SEA
SWISS
£298
Travelgenio

Related info for your journey

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.

What safety measures are being taken by airlines flying from London Heathrow to Seattle/Tacoma Intl to control the spread of COVID-19?

New policies can now be found on Delta to help keep travellers safe while flying. Airline carriers are regularly disinfecting and sanitising their aircraft. Masks are provided and are mandatory while on board. Pre-flight testing for symptoms and antibodies, alongside socially-distanced seating (for a limited time) will work towards keeping travellers safer while flying from London Heathrow to Seattle/Tacoma Intl. Policies will vary by airline.

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.

Can I find flights from Heathrow to Seattle-Tacoma International for under £424 on Cheapflights?

Yes, there are multiple flights from Heathrow to Seattle-Tacoma International for under £424. The cheapest flight booked recently is on Air Canada for just £378, but on average you can expect to pay £393.

Are there direct flights from Heathrow to Seattle-Tacoma International for under £424 on Cheapflights?

Cheapflights has 20 direct flights from Heathrow to Seattle-Tacoma International under £424. A good price for a direct flight from Heathrow to Seattle-Tacoma International is less than £454.

Are there last-minute flights available from Heathrow to Seattle-Tacoma International for under £495?

There are currently 20+ open flights from Heathrow to Seattle-Tacoma International within the next 7 days for less than £495.

Does it rain more in Heathrow or Seattle?

In Heathrow, there will be less rainfall in Heathrow compared to Seattle over the next 20 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 10h 30m. Virgin Atlantic provides one of the quickest options available for as low as £417. 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 £378 return. Other airlines that can offer you cheap pricing are Icelandair, from £392, and Lufthansa, from £394. Users have found that Air Canada is 5% 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 Virgin Atlantic. According to our data, you can fly for as low as £278. Users have also found prices from £293 and £296 on Virgin Atlantic and British Airways, respectively.

Alternative routes for Heathrow to Seattle-Tacoma International

Destination information for Seattle-Tacoma International

Today's exchange rate
£1 = $1.42

Airports servicing London

Airports servicing Seattle

Top 10 airlines flying from Heathrow to Seattle-Tacoma International

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

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
Sunday
0 flights
Monday
5 daily flights
Tuesday
0 flights
Wednesday
5 daily flights
Thursday
0 flights
Friday
3 daily flights
Saturday
0 flights
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