AirHint found the following cheapest return flights from San Francisco (SFO) to Bangkok (BKK) in December 2025 (see full year).

Return flights

01 Dec - 24 Dec	Singapore Airlines
01 Dec - 08 Dec	Asiana Airlines
03 Dec - 17 Dec	Asiana Airlines
08 Dec - 28 Jan	Asiana Airlines
08 Dec - 20 Dec	Asiana Airlines
03 Dec - 11 Jan	ANA
26 Dec - 23 Jan	Asiana Airlines
26 Dec - 09 Jan	Asiana Airlines
26 Dec - 30 Jan	Asiana Airlines
24 Dec - 11 Jan	Air Premia
15 Dec - 22 Dec	Hawaiian Airlines
25 Dec - 01 Jan	Asiana Airlines
25 Dec - 07 Jan	Asiana Airlines
01 Dec - 31 Dec	Singapore Airlines
17 Dec - 09 Jan	Zipair
23 Dec - 30 Dec	Asiana Airlines
27 Dec - 03 Jan	Asiana Airlines
19 Dec - 22 Dec	Zipair
18 Dec - 25 Dec	ANA

Also check the deals for one-way flights from San Francisco to Bangkok 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.

Book a cheap hotel in Bangkok

Cheap car rent in Bangkok

Cheapest return flights from San Francisco to Bangkok in December from 570€

Return flights