Cheapest return flights from Seattle to Lisbon in May from 444€

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

Return flights

01 May - 08 May British Airways
02 May - 09 May Air Canada
07 May - 14 May Air Canada
03 May - 10 May Lufthansa
06 May - 13 May Air Canada
05 May - 12 May Lufthansa
04 May - 12 May Lufthansa
04 May - 11 May Air France
08 May - 15 May Lufthansa
13 May - 20 May Air Canada
27 May - 03 Jun Icelandair
30 May - 06 Jun Icelandair
26 May - 02 Jun Turkish Airlines
29 May - 05 Jun Air Canada
25 May - 01 Jun Icelandair
28 May - 04 Jun WestJet
31 May - 07 Jun WestJet

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

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