Cheapest return flights from Chicago to Bangkok in September from $766

Best time to book flights for Chicago (ORD) to Bangkok (BKK) flights at AirHint

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

Return flights

23 Sep - 22 Oct Korean Air
09 Sep - 21 Oct Korean Air
08 Sep - 16 Sep Korean Air
18 Sep - 25 Sep ANA
22 Sep - 21 Oct ANA
09 Sep - 26 Sep Cathay Pacific
14 Sep - 23 Sep Korean Air
07 Sep - 30 Sep Cathay Pacific
06 Sep - 20 Sep Korean Air
07 Sep - 19 Sep Spirit Airlines
07 Sep - 13 Sep Delta
19 Sep - 04 Oct Cathay Pacific
26 Sep - 11 Oct Cathay Pacific

Also check the deals for one-way flights from Chicago to Bangkok in September.

Skyscanner

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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