AirHint found the following cheapest return flights from San Francisco (SFO) to Lisbon (LIS) in December 2026 (see full year).
Return flights
| 02 Dec - 22 Dec | British Airways | ||
| 14 Dec - 21 Dec | British Airways | ||
| 08 Dec - 17 Dec | Delta | ||
| 14 Dec - 21 Dec | TAP | direct | |
| 18 Dec - 07 Jan | British Airways | ||
| 20 Dec - 02 Jan | British Airways |
Also check the deals for one-way flights from San Francisco to Lisbon in December.
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