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

Return flights

18 Aug - 02 Sep	United
20 Aug - 26 Aug	United
28 Aug - 10 Sep	ANA
28 Aug - 08 Sep	ANA
19 Aug - 02 Sep	Cathay Pacific
07 Aug - 04 Sep	Cathay Pacific
22 Aug - 07 Sep	Cathay Pacific
30 Aug - 07 Sep	Cathay Pacific
18 Aug - 31 Aug	Air India
29 Aug - 08 Sep	Cathay Pacific
23 Aug - 31 Aug	United
25 Aug - 06 Sep	United
19 Aug - 01 Sep	ANA
07 Aug - 27 Aug	United
07 Aug - 20 Aug	Cathay Pacific
10 Aug - 20 Aug	Delta
05 Aug - 10 Aug	ANA
07 Aug - 16 Aug	Delta
07 Aug - 15 Aug	Delta
03 Aug - 09 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 603€

Return flights