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

Return flights

19 Aug - 25 Aug	Delta
18 Aug - 27 Aug	Delta
18 Aug - 15 Sep	Delta
31 Aug - 08 Sep	Delta
19 Aug - 28 Aug	Delta
28 Aug - 31 Aug	Delta
18 Aug - 25 Aug	Delta
19 Aug - 26 Aug	Delta
18 Aug - 01 Sep	Delta
15 Aug - 21 Aug	Delta
15 Aug - 22 Aug	Delta
15 Aug - 20 Aug	Delta
08 Aug - 22 Aug	Delta

Also check the deals for one-way flights from Chicago 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 Chicago to Bangkok in August from 747€

Return flights