AirHint found the following cheapest return flights from San Jose (SJC) to Singapore (SIN) in January 2026 (see full year).

Return flights

25 Jan - 01 Feb	Korean Air
26 Jan - 02 Feb	Korean Air
29 Jan - 02 Feb	Korean Air
30 Jan - 11 Feb	Korean Air
14 Jan - 21 Jan	Japan Airlines
12 Jan - 23 Jan	Japan Airlines
25 Jan - 17 Feb	Korean Air
27 Jan - 17 Feb	Korean Air
10 Jan - 03 Feb	Korean Air
16 Jan - 26 Jan	Japan Airlines
11 Jan - 27 Feb	Korean Air
09 Jan - 03 Feb	Korean Air
04 Jan - 26 Jan	Frontier Airlines
10 Jan - 16 Jan	EVA Air
19 Jan - 17 Feb	Qatar Airways
19 Jan - 31 Jan	Qatar Airways
04 Jan - 23 Jan	EVA Air
07 Jan - 09 Jan	EVA Air

Also check the deals for one-way flights from San Jose to Singapore in January.

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 January from $671

Return flights