Cheapest return flights from San Francisco to Bangkok in September from $673

Best time to book flights for San Francisco (SFO) to Bangkok (BKK) flights at AirHint

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

Return flights

02 Sep - 09 Sep Air India
01 Sep - 15 Sep Air India
09 Sep - 28 Sep Air India
08 Sep - 22 Sep Air India
24 Sep - 04 Oct Singapore Airlines
05 Sep - 08 Sep Air India
07 Sep - 22 Sep Philippine Airlines
10 Sep - 18 Sep Philippine Airlines
25 Sep - 26 Oct Air India
30 Sep - 21 Oct Singapore Airlines
15 Sep - 19 Sep Philippine Airlines
17 Sep - 29 Oct Air India
29 Sep - 11 Oct Singapore Airlines
25 Sep - 16 Oct Delta

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

Skyscanner

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