At the moment, the best time to book a non-stop flight to Seattle is in December with an average price of £583. If you're looking to fly direct to Seattle in July, expect to pay the most, with an average price of £799. 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
£481
February
£469
March
£499
April
£513
May
£531
June
£604
July
£630
August
£605
September
£540
October
£518
November
£473
December
£460
Fly from
Budget
£568 - £705
Route
Depart
Return
Price
London HeathrowSeattle/Tacoma Intl
LHR - SEA
LHRSEA
London Heathrow
Di 28/5
Nonstop9h 45m
Seattle/Tacoma Intl
Di 4/6
Nonstop9h 20m
London HeathrowSeattle/Tacoma Intl
LHR - SEA
LHRSEA
London Heathrow
Do 8/8
Nonstop9h 45m
Seattle/Tacoma Intl
Do 26/9
Nonstop9h 20m
London HeathrowSeattle/Tacoma Intl
LHR - SEA
LHRSEA
London Heathrow
Mi 29/5
Nonstop9h 45m
Seattle/Tacoma Intl
Di 27/8
Nonstop9h 20m
London HeathrowSeattle/Tacoma Intl
LHR - SEA
LHRSEA
London Heathrow
Di 28/5
Nonstop9h 45m
Seattle/Tacoma Intl
Di 4/6
Nonstop9h 20m
London HeathrowSeattle/Tacoma Intl
LHR - SEA
LHRSEA
London Heathrow
Mo 3/6
Nonstop9h 55m
Seattle/Tacoma Intl
Mo 10/6
Nonstop9h 40m
London HeathrowSeattle/Tacoma Intl
LHR - SEA
LHRSEA
London Heathrow
Di 28/5
Nonstop9h 45m
Seattle/Tacoma Intl
Mo 3/6
Nonstop9h 20m
London HeathrowSeattle/Tacoma Intl
LHR - SEA
LHRSEA
London Heathrow
Mo 17/6
Nonstop10h 20m
Seattle/Tacoma Intl
Di 2/7
Nonstop9h 20m
London HeathrowSeattle/Tacoma Intl
LHR - SEA
LHRSEA
London Heathrow
Fr 31/5
Nonstop10h 30m
Seattle/Tacoma Intl
Di 4/6
Nonstop9h 40m
London HeathrowSeattle/Tacoma Intl
LHR - SEA
LHRSEA
London Heathrow
Fr 7/6
Nonstop10h 20m
Seattle/Tacoma Intl
Di 11/6
Nonstop9h 40m
Crew
Overall
Comfort
Food
Entertainment
Boarding
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.
Crew
Overall
Comfort
Food
Entertainment
Boarding
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.
Crew
Overall
Comfort
Food
Entertainment
Boarding
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.
Crew
Overall
Comfort
Food
Entertainment
Boarding
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.
Crew
Overall
Comfort
Food
Entertainment
Boarding
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.
Crew
Overall
Comfort
Food
Entertainment
Boarding
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).