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

Return flights

10 Sep - 28 Sep	ANA
02 Sep - 17 Sep	ANA
01 Sep - 07 Oct	ANA
07 Sep - 30 Sep	Turkish Airlines
01 Sep - 18 Sep	Turkish Airlines
19 Sep - 23 Sep	ANA
28 Sep - 05 Oct	ANA
28 Sep - 12 Oct	ANA
27 Sep - 11 Oct	Singapore Airlines
17 Sep - 02 Oct	EVA Air

Also check the deals for one-way flights from Houston to Bangkok 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 Houston to Bangkok in September from $852

Return flights