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

Return flights

01 Feb - 09 Feb	Lufthansa
04 Feb - 11 Feb	Lufthansa
18 Feb - 25 Feb	Lufthansa
05 Feb - 12 Feb	Lufthansa
02 Feb - 09 Feb	Air Canada
03 Feb - 10 Feb	Air Canada
07 Feb - 14 Feb	Air Canada
19 Feb - 26 Feb	Air Canada
24 Feb - 03 Mar	Air Canada
06 Feb - 13 Feb	Air Canada
20 Feb - 27 Feb	Air Canada
25 Feb - 04 Mar	Air Canada
27 Feb - 06 Mar	Lufthansa
23 Feb - 02 Mar	Air France
26 Feb - 05 Mar	Air France
22 Feb - 01 Mar	Air France
24 Feb - 17 Mar	Delta
28 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 364€

Return flights