Cheapest return flights from San Francisco to Lisbon in May from $553

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

Return flights

10 May - 18 May SWISS
05 May - 23 May Air Canada
15 May - 21 May Lufthansa
14 May - 20 May Scandinavian Airlines
14 May - 21 May British Airways
20 May - 27 May Lufthansa
19 May - 01 Jun Lufthansa
08 May - 16 May Lufthansa
21 May - 28 May British Airways
21 May - 11 Jun SWISS
05 May - 23 May TAP direct
23 May - 31 May Air Canada
31 May - 07 Jun Air Canada
23 May - 14 Jun Lufthansa
19 May - 01 Jun TAP direct

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

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