Cheap flights to Seattle – Compare and Save

— SEA
28 Apr — 5 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 23 April 2025.

Return from

£453

One-way from

£398

Popular in

August

Cheapest in

January

Average price

£531

Good round-trip deal

£547 or less

Good one-way deal

£624 or less
Air Canada
  • Air Canada
  • 8/5-11/5
  • 4 total stops
  • 35h 57m total
  • London to Seattle
14/5
  • 14/5
  • 2 total stops
  • 17h 10m total
  • London to Seattle
Highest demand for flights based on searches. 16% potential increase in price (£83 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 23 April 2025.

Thu 8/508:40LHR - SEA
2 stops18h 57mAir Canada
Sun 11/505:30SEA - LHR
2 stops17h 00mAir Canada
Deal found 22/4£453
Wed 30/409:15LHR - SEA
2 stops21h 34mFinnair
Wed 7/522:59SEA - LHR
2 stops26h 46mFinnair
Deal found 22/4£453
Tue 4/1111:55LGW - SEA
1 stop13h 05mIcelandair
Tue 11/1114:35SEA - LGW
1 stop12h 20mIcelandair
Deal found 22/4£454
Fri 22/813:05LHR - SEA
1 stop12h 45mIcelandair
Fri 5/923:30SEA - LHR
1 stop12h 50mIcelandair
Deal found 22/4£455
Fri 2/507:30LHR - SEA
2 stops19h 03mMultiple Airlines
Sat 10/507:20SEA - LHR
1 stop15h 10mMultiple Airlines
Deal found 22/4£456
Wed 10/908:40LHR - SEA
2 stops18h 51mAir Canada
Thu 18/912:10SEA - LHR
1 stop13h 25mAir Canada
Deal found 22/4£457
Mon 12/508:40LHR - SEA
2 stops18h 57mAir Canada
Mon 19/507:20SEA - LHR
1 stop18h 40mAir Canada
Deal found 21/4£458
Mon 1/910:05LHR - SEA
2 stops19h 10mFinnair
Sun 21/923:55SEA - LHR
2 stops22h 20mFinnair
Deal found 22/4£459
Mon 28/421:25LHR - SEA
1 stop31h 15mIcelandair
Tue 13/515:45SEA - LHR
1 stop12h 10mIcelandair
Deal found 22/4£459
Sat 23/821:25LHR - SEA
1 stop22h 00mIcelandair
Sat 6/923:30SEA - LHR
1 stop12h 50mIcelandair
Deal found 23/4£460
Thu 28/813:05LHR - SEA
1 stop12h 45mIcelandair
Tue 9/915:45SEA - LHR
1 stop12h 10mIcelandair
Deal found 22/4£461
Mon 5/521:25LHR - SEA
1 stop31h 15mIcelandair
Mon 12/515:45SEA - LHR
1 stop12h 10mIcelandair
Deal found 21/4£462

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