Cheap flights from Heathrow to Seattle

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Seattle (SEA)
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The best prices from Heathrow to Seattle 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 (SEA)

LHR - SEA
Price
£304 - £563
SEA
Temperature
8 - 25 °C
SEA
Rainfall
18 - 166 mm

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

£365

Average for round-trip flights in March 2021

Round-trip from

£304

From Heathrow to Seattle

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?

Flights from Heathrow to Seattle are generally found to be more expensive on Saturday. This shouldn't discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Seattle.

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

To save on the cost of your flight from Heathrow to Seattle, book at least 52 days before your planned departure. Booking around this time can save you about 51% on the cost of this flight compared to booking a flight leaving this week. We have found prices from £443 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as £581.

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

Flights from Heathrow to Seattle lean towards being more expensive in July. Prices are generally better when you fly from Heathrow to Seattle in February, with the cheapest ticket starting at £258.

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

It’s typically best to fly out from Heathrow to Seattle 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 in March, April 2021

18 Mar - 12 May
£335pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
 
1 STOP
LHR
London Heathrow
2 Apr - 6 May
£337pp
LHR
London Heathrow
Multiple airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
 
1 STOP
LHR
London Heathrow
30 Apr - 5 Jun
£341pp
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 2021 flight deals

1 Nov - 21 Nov
£326pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
   
2 STOPS
LHR
London Heathrow
16 May - 7 Aug
£327pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
 
1 STOP
LHR
London Heathrow
1 Jul - 11 Jul
£329pp
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 from Heathrow

1 Jun - 22 Jun
£434pp
LHR
London Heathrow
Virgin Atlantic
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Virgin Atlantic
Direct
LHR
London Heathrow
17 May - 7 Jun
£440pp
LHR
London Heathrow
Virgin Atlantic
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Virgin Atlantic
Direct
LHR
London Heathrow
3 May - 24 May
£448pp
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

9 Mar - 16 Mar
£483pp
LHR
London Heathrow
Finnair
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Finnair
 
1 STOP
LHR
London Heathrow
9 Mar - 16 Mar
£507pp
LHR
London Heathrow
Virgin Atlantic
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Virgin Atlantic
 
1 STOP
LHR
London Heathrow
9 Mar - 16 Mar
£517pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Austrian Airlines
   
2 STOPS
LHR
London Heathrow

One-way flights to Seattle from Heathrow

14:00 - 05:30
Air Canada
2 stops
23h 30m
LHR - SEA
Air Canada
£288
Travel2Be
14:50 - 06:33
Virgin Atlantic
1 stop
22h 43m
LHR - SEA
Virgin Atlantic
£296
Travel2Be
05:05 - 16:12
Austrian Airlines
2 stops
43h 07m
LHR - SEA
Austrian Airlines
£303
aua.com

Related info for your journey

Flight FAQs

From Heathrow to Seattle

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 for under £358 on Cheapflights?

Yes, there are multiple flights from Heathrow to Seattle for under £358. The cheapest flight booked recently is on Multiple Airlines for just £326, but on average you can expect to pay £342.

Are there direct flights from Heathrow to Seattle for under £501 on Cheapflights?

Cheapflights has 20 direct flights from Heathrow to Seattle under £501. A good price for a direct flight from Heathrow to Seattle is less than £467.

Are there last-minute flights available from Heathrow to Seattle for under £501?

There are currently 11+ open flights from Heathrow to Seattle within the next 7 days for less than £501.

What days are direct flights available from Heathrow to Seattle?

Direct flights are available for this route on the following days: Saturday.

How many flights depart from Heathrow to Seattle on average per day?

Travellers can expect 5 flights from London Heathrow to Seattle/Tacoma Intl on average per day.
Afternoon (Midday - 6pm) - 100% of flight departures

Does it rain more in Heathrow or Seattle?

In Heathrow, there will be less rainfall in Heathrow compared to Seattle over the next 22 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?

There are many flights that can get you from Heathrow to Seattle in 11h 45m. Fly via Air Canada, Lufthansa, or Brussels Airlines to get the fastest option. The distance from Heathrow to Seattle is about 4812 mi. This flight may include one or multiple stops.

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

Currently priced at £342, Lufthansa will fly you from Heathrow to Seattle and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Air Canada and Austrian Airlines - these airlines can fly you to your destination from £349 and £370, respectively. These flights start at 15% lower than the current average price 3 months from now.

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

To fly one-way, consider booking your trip with Virgin Atlantic, which is currently one of the cheapest options available, starting at £278. Air Canada flights start at £285 while deals on Austrian Airlines start at £290 one-way.

Alternative routes for Heathrow to Seattle

Destination information for Seattle

Today's exchange rate
£1 = $1.40
Average temperature for March in Seattle
13.0 °C
Avg rainfall for March in Seattle
97.0 mm

Airports servicing London

Airports servicing Seattle

Top 10 airlines flying from Heathrow to Seattle

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

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