Cheapest return flights from San Francisco to Lisbon in September from $543

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

16 Sep - 01 Oct LEVEL
11 Sep - 30 Sep LEVEL
02 Sep - 16 Sep LEVEL
02 Sep - 13 Sep LEVEL
04 Sep - 08 Sep LEVEL
04 Sep - 08 Sep TAP direct
22 Sep - 01 Oct TAP direct
25 Sep - 02 Oct TAP direct
11 Sep - 30 Sep TAP direct
03 Sep - 24 Sep TAP direct
13 Sep - 24 Sep TAP direct
02 Sep - 23 Sep TAP
03 Sep - 17 Sep TAP direct
20 Sep - 12 Oct British Airways

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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon