AirHint found the following cheapest one-way flights from San Francisco (SFO) to Lisbon (LIS) in August 2026 (see full year).
One-Way flights
| 15 Aug | Frontier Airlines | ||
| 23 Aug | Aer Lingus | ||
| 25 Aug | Aer Lingus | ||
| 24 Aug | Aer Lingus | ||
| 26 Aug | Aer Lingus | ||
| 08 Aug | FrenchBee | ||
| 29 Aug | Aer Lingus | ||
| 07 Aug | Air Canada | ||
| 15 Aug | TAP | direct | |
| 27 Aug | Air Canada |
Also check the deals for return flights from San Francisco to Lisbon in August.
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