AirHint found the following cheapest return flights from San Francisco (SFO) to Athens (ATH) in December 2025 (see full year).

Return flights

29 Dec - 14 Jan	Scandinavian Airlines
10 Dec - 17 Dec	Lufthansa
02 Dec - 16 Dec	Air Canada
28 Dec - 11 Jan	Scandinavian Airlines
01 Dec - 27 Dec	Scandinavian Airlines
16 Dec - 23 Dec	British Airways
27 Dec - 11 Jan	Scandinavian Airlines
11 Dec - 19 Dec	British Airways
05 Dec - 19 Dec	British Airways
02 Dec - 27 Dec	SWISS
14 Dec - 27 Dec	SWISS
16 Dec - 10 Jan	British Airways
17 Dec - 29 Dec	KLM
12 Dec - 04 Jan	Scandinavian Airlines
22 Dec - 01 Jan	Delta
21 Dec - 31 Dec	British Airways
21 Dec - 01 Jan	British Airways
17 Dec - 04 Jan	SWISS
19 Dec - 10 Jan	Lufthansa
21 Dec - 03 Jan	Scandinavian Airlines

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

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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Cheapest return flights from San Francisco to Athens in December from $494

Return flights