Cheapest return flights from San Francisco to Lisbon in December from $506

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 December 2025 (see full year).

Return flights

02 Dec - 09 Dec Finnair
03 Dec - 10 Dec Finnair
04 Dec - 11 Dec Finnair
05 Dec - 12 Dec Finnair
08 Dec - 15 Dec Finnair
01 Dec - 09 Dec Finnair
02 Dec - 10 Dec Finnair
03 Dec - 11 Dec Finnair
04 Dec - 12 Dec Finnair
25 Dec - 09 Jan British Airways
07 Dec - 15 Dec Finnair
27 Dec - 07 Jan Finnair
27 Dec - 07 Jan TAP direct
20 Dec - 03 Jan TAP direct

Also check the deals for one-way flights from San Francisco to Lisbon in December.

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.

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