AirHint found the following cheapest one-way flights from San Francisco (SFO) to Lisbon (LIS) in September 2026 (see full year).
One-Way flights
| 23 Sep | British Airways | ||
| 26 Sep | British Airways | ||
| 05 Sep | Alaska Airlines | ||
| 04 Sep | Alaska Airlines | ||
| 28 Sep | TAP | direct | |
| 23 Sep | TAP | direct | |
| 26 Sep | TAP | direct | |
| 05 Sep | TAP | direct |
Also check the deals for return flights from San Francisco to Lisbon in September.
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