AirHint found the following cheapest return flights from Seattle (SEA) to Lisbon (LIS) in February 2026 (see full year).

Return flights

04 Feb - 12 Feb	Icelandair
07 Feb - 15 Feb	Icelandair
11 Feb - 19 Feb	Icelandair
14 Feb - 22 Feb	Icelandair
18 Feb - 26 Feb	Icelandair
21 Feb - 01 Mar	Icelandair
25 Feb - 05 Mar	Icelandair
28 Feb - 08 Mar	Icelandair
03 Feb - 11 Feb	British Airways
10 Feb - 18 Feb	British Airways
09 Feb - 17 Feb	British Airways
17 Feb - 25 Feb	British Airways
23 Feb - 03 Mar	British Airways
24 Feb - 04 Mar	British Airways
13 Feb - 07 Mar	Air Canada
01 Feb - 09 Feb	United
26 Feb - 06 Mar	United
22 Feb - 02 Mar	United
27 Feb - 07 Mar	Air France

Also check the deals for one-way flights from Seattle to Lisbon in February.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Seattle to Lisbon in February from $505

Return flights