How do most travelers feel about British Airways?

The general consensus from 8,195 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 £591?

London Heathrow Airport to Seattle flights on British Airways are currently available under £591. 9 flights have been found by Cheapflights users under that amount. To find flights for your dates, click here.

How far ahead should I book a flight from London Heathrow Airport to Seattle with British Airways?

Booking with British Airways 82 days in advance of your planned departure date is, on average, the best time to get cheap flights from London Heathrow Airport to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from London Heathrow Airport to Seattle with British Airways?

Currently, the most affordable month to book a British Airways flight from London Heathrow Airport to Seattle in January, with an average price of £538. Conversely, traveling with British Airways from London Heathrow Airport to Seattle in December will be the most expensive, with an average cost of £689. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.

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 Tuesday, which is when the least amount of flights are scheduled (1 on average).

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.

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).

£376+ British Airways Flights 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 1 September 2026.

Fri 18/914:25 -

1 stop15h 11m

Fri 20/1118:45 -

Nonstop9h 25m

Deal found 27/8£536

Sat 24/1009:50 -

Nonstop9h 45m

Sun 25/1019:45 -

Nonstop9h 25m

Deal found 31/8£572

Fri 4/914:25 -

1 stop17h 34m

Mon 7/917:40 -

2 stops31h 35m

Deal found 27/8£625

How do most travelers feel about British Airways?
The general consensus from 8,195 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 £591?
London Heathrow Airport to Seattle flights on British Airways are currently available under £591. 9 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

One-way from	£376
Return from	£536
Popular in	July
Cheapest in	January
Average price (all airlines)	£575

British Airways
27/10
Nonstop
10h 00m total
London to Seattle

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British Airways
18/9-20/11
1 total stop
24h 36m total
London to Seattle

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Highest demand for flights from London Heathrow to Seattle/Tacoma Intl; 6% potential price increase.

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Best time to find cheap flights from London Heathrow to Seattle/Tacoma Intl; 1% potential price drop.

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Average price for all London Heathrow to Seattle/Tacoma Intl flights (one-way and round-trip).

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Prices

Airlines

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 34 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 January. The most expensive months are December and July.

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

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British Airways flights from London Heathrow Airport to Seattle (LHR - SEA)

Find British Airways flight deals from Heathrow to Seattle

Cheapest British Airways flights from Heathrow to SeattleExplore the most affordable British Airways flight options available from Heathrow to Seattle. Find the lowest fares with prices last updated on 1 September 2026.

Explore the most affordable British Airways flight options available from Heathrow to Seattle. Find the lowest fares with prices last updated on 1 September 2026.

Best British Airways flights from Heathrow to SeattleDiscover 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 1 September 2026.

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 1 September 2026.

Direct British Airways flights from Heathrow to SeattleExplore 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 1 September 2026.

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 1 September 2026.

Last-minute British Airways flights from Heathrow to SeattleDiscover last-minute British Airways flight deals from Heathrow to Seattle. Data last updated 1 September 2026 and is based on user searches.

Discover last-minute British Airways flight deals from Heathrow to Seattle. Data last updated 1 September 2026 and is based on user searches.

One-way British Airways flights to SeattleSearch for one-way British Airways flight options to Seattle. Find affordable one-way fares based on user searches. Data last updated 1 September 2026.

Search for one-way British Airways flight options to Seattle. Find affordable one-way fares based on user searches. Data last updated 1 September 2026.

How do most travelers feel about British Airways?

Can I get a flight from London Heathrow Airport to Seattle on British Airways for under £591?

British Airways flights from Heathrow to Seattle in 2026

One-way from

Return from

Popular in

Cheapest in

Average price (all airlines)

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 34 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 January. 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 Tuesday, which is when the least amount of flights are scheduled (1 on average).

Rainfall in Seattle 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

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.

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 1 September 2026.

Other British Airways flights from Heathrow

Browse through other British Airways flights departing from Heathrow. Flight routes are based on user searches made on Cheapflights and were last updated on 1 September 2026.

Complete your trip

Complete your trip to Seattle by adding a car hire and/or hotel booking to your travel itinerary.

Other airlines servicing Heathrow and Seattle

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Other popular destinations in North America

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 1 September 2026.

Popular flights with British Airways

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 1 September 2026.

See what others are saying about British Airways

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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 1 September 2026.

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 1 September 2026.

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 1 September 2026.

Last-minute British Airways flights from Heathrow to Seattle
Discover last-minute British Airways flight deals from Heathrow to Seattle. Data last updated 1 September 2026 and is based on user searches.

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 1 September 2026.