British Airways flights from London Heathrow Airport to Seattle (LHR - SEA)
LHR — SEA
12 Oct — 19 Oct1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Find British Airways flight deals from Heathrow to Seattle
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Cheapest British Airways flights from Heathrow to Seattle
Explore the most affordable British Airways flight options available from Heathrow to Seattle. Find the lowest fares with prices last updated on 12 September 2026.
Sat 19/909:15 -
2 stops18h 52m
Mon 5/1013:37 -
1 stop15h 08m
Deal found 11/9£445
Sun 4/1008:50 -
1 stop16h 20m
Wed 14/1010:31 -
1 stop13h 24m
Deal found 11/9£450
Mon 21/909:15 -
1 stop19h 50m
Mon 5/1020:20 -
Nonstop9h 25m
Deal found 11/9£477
Best British Airways flights from Heathrow to Seattle
Discover carefully curated British Airways flight deals from Heathrow to Seattle that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 September 2026.
Sat 12/1215:40 -
2 stops38h 19m
Sat 9/105:00 -
1 stop23h 15m
Deal found 11/9£442
Sun 4/1008:50 -
1 stop16h 20m
Wed 14/1010:31 -
1 stop13h 24m
Deal found 11/9£450
Sun 6/1211:00 -
1 stop17h 20m
Tue 5/113:56 -
1 stop32h 59m
Deal found 11/9£451
Direct British Airways flights from Heathrow to Seattle
Explore direct British Airways flight options from Heathrow to Seattle based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 September 2026.
Sun 10/114:55 -
Nonstop9h 55m
Sat 16/118:45 -
Nonstop9h 25m
Deal found 12/9£442
Fri 26/214:55 -
Nonstop9h 55m
Wed 24/319:45 -
Nonstop9h 25m
Deal found 10/9£454
Mon 22/214:55 -
Nonstop9h 55m
Wed 24/319:45 -
Nonstop9h 25m
Deal found 10/9£455
Last-minute British Airways flights from Heathrow to Seattle
Discover last-minute British Airways flight deals from Heathrow to Seattle. Data last updated 12 September 2026 and is based on user searches.
Sat 19/909:15 -
2 stops18h 52m
Mon 5/1013:37 -
1 stop15h 08m
Deal found 11/9£445
Sun 4/1008:50 -
1 stop16h 20m
Wed 14/1010:31 -
1 stop13h 24m
Deal found 11/9£450
Mon 21/909:15 -
1 stop19h 50m
Mon 5/1020:20 -
Nonstop9h 25m
Deal found 11/9£477
One-way British Airways flights to Seattle
Search for one-way British Airways flight options to Seattle. Find affordable one-way fares based on user searches. Data last updated 12 September 2026.
Tue 3/1112:35 -
1 stop15h 45m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 8/9£380
Mon 2/1112:35 -
1 stop15h 45m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 10/9£381
Tue 15/1207:45 -
2 stops22h 14m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 9/9£382
How do most travelers feel about British Airways?
The general consensus from 8,213 Cheapflights users is that British Airways is a 6.7/10. Select your travel dates above for updated prices on flights from London Heathrow Airport to Seattle (LHR-SEA).
Can I get a flight from London Heathrow Airport to Seattle on British Airways for under £592?
London Heathrow Airport to Seattle flights on British Airways are currently available under £592. 12 flights have been found by Cheapflights users under that amount. To find flights for your dates, click here.
British Airways flights from Heathrow to Seattle in 2026
Find detailed information about British Airways flights from Heathrow to Seattle. Explore the options provided by British Airways to plan your journey from Heathrow to Seattle. Data last updated 12 September 2026.
When is the best time to book a flight to Seattle with British Airways?
The best time to book a flight to Seattle with British Airways is 82 days before departure. On average, fares are higher if you book 4 days before departure.
Which month is the cheapest to fly Economy class from London Heathrow Airport to Seattle?
For Economy class flights, the cheapest month to fly this route is February. The most expensive months are December and July.
Weekly British Airways flight availability from London Heathrow Airport to Seattle
The most British Airways flights from LHR to SEA are scheduled on a Monday (2 on average). You will have fewer British Airways flight options on Monday, which is when the least amount of flights are scheduled (2 on average).
Rainfall in Seattle by month
Plan your trip to Seattle by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.
Temperature in Seattle by month
Plan your trip to Seattle by taking into account the average temperature totals by month.
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).
Best time to book a flight from Heathrow to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Heathrow with our price prediction graph.
LHR-SEA
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
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Fly from Heathrow to Seattle on another airline
Consider alternative airlines that service the Seattle area. Flight routes are based on user searches made on Cheapflights and were last updated on 12 September 2026.
Browse through other British Airways flights departing from Heathrow. Flight routes are based on user searches made on Cheapflights and were last updated on 12 September 2026.
If Seattle is not for you, choose from these other destinations located in North America. Flight routes are based on user searches made on Cheapflights and were last updated on 12 September 2026.
Browse through some of the most popular routes that British Airways offers at this time. Flights are based on user searches made on Cheapflights and were last updated on 12 September 2026.
Read reviews and see what other travellers are saying about their experiences with British Airways. Get insights from real passengers regarding the airline's services, customer satisfaction, and overall travel experience. Use these reviews to inform your decision when choosing British Airways for your next flight. Reviews last updated 12 September 2026.
We had an absolute nightmare experience with British Airways. Check in was bad. They “lost” our business class seats that I selected a long time ago. Our luggage almost didn’t make it on the plane in London to LAX. Flight attendant was rude!! Not that it should matter but she thought bc of the seat assignment issue we were “upgraded” and that’s we had no choice in meals. Not that the meals were any good anyway.
10.0
Wonderful|Jul 2026
Great 👍
10.0
Wonderful|Jul 2026
The smooth transition from one plane to another 👌
10.0
Wonderful|Jul 2026
The journey was great and smooth.
8.0
Very Good|Jul 2026
Strange selection of movies
1 out of 2738
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