Cheap First Class flights to Seattle
LHR — SEA
14 Nov — 21 Nov1
Best travel deals
Find the best flight deals available from hundreds of sites within secondsTrusted and free
Cheapflights is 100% free to use. No hidden charges!Book with flexibility
Easily find flight tickets with no change feesCheap first class flights to Seattle in 2025
Find the latest flights to Seattle in 2025, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data were last updated on 15 October 2025.
Average Price | £4,135 |
|---|---|
Cheapest Price | £2,374 |
Top Rated Airline | Finnair |
No. of Airlines | 3 |
Arrival Airport | Seattle/Tacoma Intl Airport |
Find first class flight deals to Seattle
Cheapest first class flights to SeattleExplore the most affordable first class flight options available to Seattle. Find the lowest fares based on data from user searches, with prices last updated on 15 October 2025.
Explore the most affordable first class flight options available to Seattle. Find the lowest fares based on data from user searches, with prices last updated on 15 October 2025.
Tue 7/414:25LHR - SEA
1 stop16h 35mAmerican Airlines
Sat 18/413:30SEA - LHR
Nonstop9h 25mAmerican Airlines
Deal found 14/10£3,669
Tue 7/416:30LHR - SEA
Nonstop9h 50mBritish Airways
Sat 18/413:30SEA - LHR
Nonstop9h 25mBritish Airways
Deal found 14/10£3,745
Tue 24/216:30LHR - SEA
1 stop16h 27mAmerican Airlines
Tue 3/310:02SEA - LHR
1 stop14h 13mAmerican Airlines
Deal found 15/10£3,751
Tue 24/209:25LHR - SEA
Nonstop10h 05mBritish Airways
Tue 3/313:25SEA - LHR
Nonstop9h 35mBritish Airways
Deal found 15/10£3,949
Tue 25/1114:55LHR - SEA
Nonstop10h 00mBritish Airways
Sat 13/1218:50SEA - LHR
Nonstop9h 30mBritish Airways
Deal found 13/10£4,779
Tue 25/1112:30LHR - SEA
1 stop17h 54mAmerican Airlines
Sat 13/1207:15SEA - LHR
1 stop15h 35mAmerican Airlines
Deal found 13/10£5,077
Travel insights for first class flights from United Kingdom to Seattle
Get recent, data-driven insights about first class flights from United Kingdom to Seattle including ideal travel times, pricing trends, and more.
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).