AirHint found the following cheapest return flights from Bangkok (BKK) to Los Angeles (LAX) in September 2025 (see full year).

Return flights

14 Sep - 21 Sep	Sichuan Airlines
08 Sep - 15 Sep	Philippine Airlines
21 Sep - 28 Sep	Philippine Airlines
15 Sep - 20 Sep	Philippine Airlines
01 Sep - 08 Sep	Philippine Airlines
12 Sep - 06 Oct	Philippine Airlines
05 Sep - 20 Sep	Philippine Airlines
12 Sep - 15 Sep	Philippine Airlines
04 Sep - 18 Sep	Xiamen Airlines
10 Sep - 18 Sep	Philippine Airlines
02 Sep - 16 Sep	Philippine Airlines
29 Sep - 04 Oct	Philippine Airlines
22 Sep - 03 Oct	Philippine Airlines
26 Sep - 03 Oct	Philippine Airlines
09 Sep - 09 Oct	United
24 Sep - 01 Oct	Delta

Also check the deals for one-way flights from Bangkok to Los Angeles in September.

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 Bangkok to Los Angeles in September from $610

Return flights