AirHint found the following cheapest return flights from San Jose (SJC) to Singapore (SIN) in December 2025 (see full year).

Return flights

02 Dec - 23 Dec	China Airlines
26 Dec - 08 Jan	Korean Air
23 Dec - 13 Jan	China Airlines
02 Dec - 12 Dec	EVA Air
07 Dec - 20 Dec	EVA Air
16 Dec - 23 Dec	China Airlines
17 Dec - 28 Dec	EVA Air
26 Dec - 07 Jan	Korean Air
15 Dec - 31 Dec	China Airlines
18 Dec - 28 Dec	EVA Air
15 Dec - 30 Dec	Qatar Airways
20 Dec - 28 Dec	China Airlines
20 Dec - 27 Dec	China Airlines
16 Dec - 04 Jan	EVA Air
12 Dec - 02 Jan	Qatar Airways
24 Dec - 03 Jan	Qatar Airways
19 Dec - 06 Jan	Qatar Airways
19 Dec - 03 Jan	Qatar Airways
17 Dec - 03 Jan	Singapore Airlines

Also check the deals for one-way flights from San Jose to Singapore 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 Jose to Singapore in December from $1099

Return flights