Cheapest return flights from San Francisco to Lisbon in September from $627

Best time to book flights for San Francisco (SFO) to Lisbon (LIS) flights at AirHint

AirHint found the following cheapest return flights from San Francisco (SFO) to Lisbon (LIS) in September 2025 (see full year).

Return flights

23 Sep - 30 Sep Scandinavian Airlines
23 Sep - 07 Oct Air Canada
06 Sep - 13 Sep Scandinavian Airlines
23 Sep - 04 Oct Scandinavian Airlines
11 Sep - 22 Sep Scandinavian Airlines
03 Sep - 16 Sep Scandinavian Airlines
11 Sep - 18 Sep United
03 Sep - 16 Sep TAP direct
11 Sep - 18 Sep TAP direct
11 Sep - 22 Sep TAP direct
06 Sep - 13 Sep TAP direct
23 Sep - 07 Oct TAP direct
23 Sep - 30 Sep TAP direct
23 Sep - 04 Oct TAP direct

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

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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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