Cheapest return flights from San Francisco to Bangkok in September from $701

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

03 Sep - 15 Sep Philippine Airlines
01 Sep - 22 Sep Philippine Airlines
07 Sep - 20 Sep Philippine Airlines
25 Sep - 30 Oct Singapore Airlines
15 Sep - 26 Sep Philippine Airlines
17 Sep - 29 Oct Philippine Airlines
10 Sep - 17 Sep 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