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

Return flights

15 Jan - 24 Jan	Singapore Airlines
14 Jan - 24 Jan	Singapore Airlines
22 Jan - 29 Jan	Singapore Airlines
14 Jan - 26 Jan	Singapore Airlines
29 Jan - 14 Feb	Singapore Airlines
19 Jan - 25 Jan	Singapore Airlines
27 Jan - 16 Feb	Singapore Airlines
25 Jan - 05 Feb	Singapore Airlines
14 Jan - 18 Feb	Singapore Airlines
05 Jan - 12 Jan	China Airlines
07 Jan - 21 Jan	China Airlines
15 Jan - 19 Jan	China Airlines
01 Jan - 20 Jan	Korean Air
14 Jan - 22 Feb	Korean Air
05 Jan - 16 Jan	China Airlines
01 Jan - 01 Feb	Asiana Airlines
18 Jan - 18 Feb	United
24 Jan - 15 Feb	Delta

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 563€

Return flights