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

Return flights

18 Aug - 27 Aug	United
19 Aug - 28 Aug	United
19 Aug - 26 Aug	United
25 Aug - 21 Sep	United
27 Aug - 24 Sep	Cathay Pacific
18 Aug - 02 Sep	ANA
19 Aug - 30 Aug	United
04 Aug - 15 Sep	Cathay Pacific
20 Aug - 06 Sep	ANA
31 Aug - 06 Sep	United
12 Aug - 22 Aug	Korean Air
03 Aug - 27 Aug	ANA
28 Aug - 31 Aug	Cathay Pacific
21 Aug - 03 Sep	Delta
01 Aug - 26 Aug	Korean Air
04 Aug - 22 Aug	Delta
03 Aug - 26 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.

Book a cheap hotel in Bangkok

Cheap car rent in Bangkok

Cheapest return flights from Chicago to Bangkok in August from 605€

Return flights