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

Return flights

20 Aug - 03 Sep	Alaska Airlines
18 Aug - 24 Sep	Delta
24 Aug - 31 Aug	Delta
20 Aug - 28 Aug	Korean Air
10 Aug - 25 Aug	Delta
10 Aug - 24 Aug	Delta
22 Aug - 03 Sep	Delta
09 Aug - 24 Aug	Delta
09 Aug - 25 Aug	Delta
30 Aug - 07 Sep	Delta
09 Aug - 23 Aug	Delta
05 Aug - 15 Aug	Korean Air
22 Aug - 31 Aug	Korean Air

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 $800

Return flights