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

Return flights

29 Jan - 15 Feb	China Southern
22 Jan - 01 Feb	China Southern
30 Jan - 15 Feb	Air Premia
22 Jan - 29 Jan	Korean Air
20 Jan - 27 Jan	Korean Air
21 Jan - 11 Feb	Korean Air
19 Jan - 02 Feb	Korean Air
22 Jan - 27 Jan	Korean Air
19 Jan - 10 Feb	Korean Air
26 Jan - 05 Feb	Korean Air
19 Jan - 16 Feb	Korean Air
22 Jan - 10 Feb	Korean Air
19 Jan - 09 Feb	Korean Air
19 Jan - 31 Jan	Asiana Airlines
26 Jan - 30 Jan	Asiana Airlines
22 Jan - 31 Jan	China Eastern
19 Jan - 25 Jan	Korean Air
13 Jan - 23 Jan	Asiana Airlines
15 Jan - 25 Jan	Air India
21 Jan - 31 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 421€

Return flights