AirHint found the following cheapest return flights from San Francisco (SFO) to Bangkok (BKK) in January 2026 (see full year).

Return flights

22 Jan - 05 Feb	Singapore Airlines
17 Jan - 06 Feb	Singapore Airlines
30 Jan - 06 Feb	Singapore Airlines
22 Jan - 17 Feb	Singapore Airlines
15 Jan - 22 Jan	Asiana Airlines
14 Jan - 20 Jan	Asiana Airlines
08 Jan - 29 Jan	Asiana Airlines
19 Jan - 10 Feb	United
06 Jan - 13 Jan	Cathay Pacific
11 Jan - 25 Feb	United
01 Jan - 09 Jan	Asiana Airlines

Also check the deals for one-way flights from San Francisco to Bangkok 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 Francisco to Bangkok in January from 571€

Return flights