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

Return flights

11 Aug - 26 Aug	Delta
18 Aug - 24 Sep	Delta
22 Aug - 31 Aug	Delta
30 Aug - 07 Sep	Delta
22 Aug - 03 Sep	Delta
01 Aug - 11 Aug	Delta
01 Aug - 12 Aug	Delta
01 Aug - 10 Aug	Delta
08 Aug - 20 Aug	Korean Air
01 Aug - 06 Aug	Korean Air
15 Aug - 18 Aug	Frontier Airlines
04 Aug - 07 Aug	Delta
01 Aug - 04 Aug	Delta

Also check the deals for one-way flights from Phoenix 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 Phoenix to Bangkok in August from 705€

Return flights