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

Return flights

28 Dec - 13 Jan	British Airways
30 Dec - 11 Jan	British Airways
28 Dec - 11 Jan	British Airways
26 Dec - 09 Jan	British Airways
27 Dec - 10 Jan	British Airways
16 Dec - 22 Dec	British Airways
25 Dec - 08 Jan	British Airways
22 Dec - 11 Jan	British Airways
25 Dec - 31 Dec	Scandinavian Airlines
25 Dec - 10 Jan	Frontier Airlines
16 Dec - 09 Jan	Lufthansa
16 Dec - 08 Jan	Lufthansa
23 Dec - 30 Dec	British Airways
18 Dec - 25 Dec	British Airways
19 Dec - 22 Dec	British Airways
20 Dec - 27 Dec	British Airways

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 $718

Return flights