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

Return flights

25 Aug - 16 Sep	Spirit Airlines
28 Aug - 02 Sep	Delta
18 Aug - 01 Sep	Delta
27 Aug - 03 Sep	Delta
31 Aug - 15 Sep	Delta
25 Aug - 27 Aug	ANA
18 Aug - 29 Aug	Delta
21 Aug - 28 Aug	Delta
28 Aug - 06 Sep	Delta
24 Aug - 03 Sep	Spirit Airlines
27 Aug - 02 Sep	ANA
23 Aug - 31 Aug	EVA Air
21 Aug - 25 Aug	Cathay Pacific
20 Aug - 25 Aug	Cathay Pacific
29 Aug - 01 Sep	Frontier Airlines

Also check the deals for one-way flights from Houston to Bangkok in August.

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 August from 745€

Return flights