Cheap flights to Seattle – Compare and Save

— SEA
5 May — 12 May1
1 adult

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 was last updated on 30 April 2025.

Return from

£456

One-way from

£406

Popular in

August

Cheapest in

January

Average price

£529

Good round-trip deal

£545 or less

Good one-way deal

£627 or less
Icelandair
  • Icelandair
  • 28/8-9/9
  • 2 total stops
  • 36h 10m total
  • London to Seattle
23/6
  • 23/6
  • 1 total stop
  • 20h 00m total
  • London to Seattle
Highest demand for flights based on searches. 16% potential increase in price (£81 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
Average for return flights in April 2025
Price to beat on a round-trip flight from London to Seattle/Tacoma Intl.
Price to beat on a one-way flight from London to Seattle/Tacoma Intl.

Find flight deals to Seattle

Cheapest flights to Seattle
Explore the most affordable flight options available to Seattle. Find the lowest fares based on data from user searches, with prices last updated on 30 April 2025.

Thu 28/813:05LHR - SEA
1 stop15h 35mIcelandair
Tue 9/915:45SEA - LHR
1 stop20h 35mIcelandair
Deal found 28/4£456
Sat 20/915:40LGW - SEA
1 stop13h 00mIcelandair
Sat 11/1015:45SEA - LGW
1 stop14h 55mIcelandair
Deal found 29/4£457
Fri 29/815:40LGW - SEA
1 stop13h 00mIcelandair
Wed 17/919:00SEA - LGW
1 stop11h 40mIcelandair
Deal found 29/4£459
Thu 8/521:25LHR - SEA
1 stop28h 25mIcelandair
Thu 22/523:30SEA - LHR
1 stop12h 50mIcelandair
Deal found 29/4£459
Tue 16/906:00LHR - SEA
2 stops20h 36mSWISS
Tue 23/910:55SEA - LHR
2 stops24h 25mSWISS
Deal found 28/4£460
Wed 14/509:00LHR - SEA
1 stop15h 59mLufthansa
Wed 21/510:00SEA - LHR
2 stops17h 50mLufthansa
Deal found 28/4£461
Mon 5/509:30LHR - SEA
1 stop18h 07mLufthansa
Mon 19/523:35SEA - LHR
1 stop23h 10mLufthansa
Deal found 28/4£462
Tue 13/506:30LHR - SEA
1 stop13h 55mUnited Airlines
Tue 20/512:45SEA - LHR
1 stop13h 40mUnited Airlines
Deal found 28/4£462
Fri 29/807:25LHR - SEA
1 stop17h 34mUnited Airlines
Wed 17/911:11SEA - LHR
2 stops16h 34mUnited Airlines
Deal found 29/4£463
Thu 15/515:40LGW - SEA
1 stop13h 00mIcelandair
Sat 24/523:30SEA - LGW
1 stop31h 10mIcelandair
Deal found 29/4£464
Fri 19/906:15LHR - SEA
1 stop13h 00mVirgin Atlantic
Mon 29/920:25SEA - LHR
Nonstop9h 50mVirgin Atlantic
Deal found 28/4£464
Thu 8/507:35STN - SEA
2 stops18h 15mMultiple Airlines
Thu 22/515:45SEA - STN
2 stops17h 40mMultiple Airlines
Deal found 29/4£465

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