Cheapest return flights from San Francisco to Lisbon in September from 451€

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

Return flights

23 Sep - 29 Sep SWISS
23 Sep - 07 Oct Iberia For Level
24 Sep - 07 Oct SWISS
20 Sep - 18 Oct Iberia For Level
22 Sep - 29 Sep ITA Airways
29 Sep - 13 Oct Aer Lingus
24 Sep - 08 Oct Condor
30 Sep - 09 Oct United
23 Sep - 21 Oct United
22 Sep - 02 Oct Air Canada
22 Sep - 01 Oct Air Canada
22 Sep - 30 Sep SWISS
24 Sep - 09 Oct SWISS
06 Sep - 20 Sep Frontier Airlines
18 Sep - 30 Sep British Airways
01 Sep - 26 Sep Frontier Airlines
13 Sep - 26 Sep Iberia For Level
02 Sep - 12 Sep United
17 Sep - 29 Sep Delta
16 Sep - 27 Sep Delta

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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