Cheapest return flights from Chicago to Bangkok in September from $709

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

Return flights

08 Sep - 17 Sep Delta
16 Sep - 06 Oct Delta
15 Sep - 06 Oct Delta
17 Sep - 25 Sep Delta
09 Sep - 22 Sep Delta
08 Sep - 15 Sep Delta
16 Sep - 18 Sep Delta
25 Sep - 03 Oct Delta
05 Sep - 19 Sep Delta
15 Sep - 30 Sep Delta
26 Sep - 03 Oct Delta
29 Sep - 06 Oct Korean Air
15 Sep - 22 Sep Korean Air
27 Sep - 04 Oct Korean Air

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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