Cheapest return flights from San Francisco to Lisbon in September from $693

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

30 Sep - 08 Oct United
24 Sep - 15 Oct SWISS
02 Sep - 09 Sep Air Canada
16 Sep - 23 Sep Scandinavian Airlines
09 Sep - 16 Sep United
10 Sep - 20 Sep British Airways
06 Sep - 13 Sep Turkish Airlines
11 Sep - 21 Sep Turkish Airlines
29 Sep - 06 Oct United
09 Sep - 16 Sep TAP direct
02 Sep - 09 Sep TAP direct
19 Sep - 26 Sep United
10 Sep - 20 Sep TAP direct
30 Sep - 08 Oct TAP direct
29 Sep - 06 Oct TAP direct

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

Skyscanner

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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