At the moment, the best time to book a non-stop flight to Seattle is in December with an average price of £594. If you're looking to fly direct to Seattle in July, expect to pay the most, with an average price of £802. Keep in mind that different factors like airlines, departure airports, and times can affect the cost of your flight, so it's a good idea to compare these to find the best deal.
January
£488
February
£480
March
£506
April
£520
May
£555
June
£612
July
£640
August
£609
September
£547
October
£524
November
£480
December
£474
Fly from
Budget
£452 - £667
Route
Depart
Return
Price
London HeathrowSeattle/Tacoma Intl
LHR - SEA
LHRSEA
London Heathrow
Thu 24/10
Nonstop10h 25m
Seattle/Tacoma Intl
Thu 31/10
Nonstop9h 35m
London HeathrowSeattle/Tacoma Intl
LHR - SEA
LHRSEA
London Heathrow
Tue 10/9
Nonstop9h 55m
Seattle/Tacoma Intl
Mon 23/9
Nonstop9h 35m
London HeathrowSeattle/Tacoma Intl
LHR - SEA
LHRSEA
London Heathrow
Mon 23/9
Nonstop9h 45m
Seattle/Tacoma Intl
Wed 2/10
Nonstop9h 20m
London HeathrowSeattle/Tacoma Intl
LHR - SEA
LHRSEA
London Heathrow
Mon 16/9
Nonstop9h 55m
Seattle/Tacoma Intl
Wed 25/9
Nonstop9h 20m
London HeathrowSeattle/Tacoma Intl
LHR - SEA
LHRSEA
London Heathrow
Tue 17/9
Nonstop10h 30m
Seattle/Tacoma Intl
Thu 26/9
Nonstop9h 35m
London HeathrowSeattle/Tacoma Intl
LHR - SEA
LHRSEA
London Heathrow
Mon 13/5
Nonstop9h 45m
Seattle/Tacoma Intl
Mon 20/5
Nonstop9h 20m
London HeathrowSeattle/Tacoma Intl
LHR - SEA
LHRSEA
London Heathrow
Tue 14/5
Nonstop9h 45m
Seattle/Tacoma Intl
Sun 19/5
Nonstop9h 20m
London HeathrowSeattle/Tacoma Intl
LHR - SEA
LHRSEA
London Heathrow
Mon 14/10
Nonstop9h 45m
Seattle/Tacoma Intl
Wed 30/10
Nonstop9h 20m
London HeathrowSeattle/Tacoma Intl
LHR - SEA
LHRSEA
London Heathrow
Fri 12/7
Nonstop10h 20m
Seattle/Tacoma Intl
Tue 16/7
Nonstop9h 20m
Boarding
Overall
Comfort
Crew
Entertainment
Food
Reviews
When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Boarding
Overall
Comfort
Crew
Entertainment
Food
Reviews
When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Boarding
Overall
Comfort
Crew
Entertainment
Food
Reviews
When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Boarding
Overall
Comfort
Crew
Entertainment
Food
Reviews
When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Boarding
Overall
Comfort
Crew
Entertainment
Food
Reviews
When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Boarding
Overall
Comfort
Crew
Entertainment
Food
Reviews
When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
SEA Temperature | 5 - 19 °C |
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If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).