Cheapest one-way flights from Chicago to Bangkok in September from $344

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

One-Way flights

14 Sep Alaska Airlines
17 Sep Alaska Airlines
30 Sep Cathay Pacific
25 Sep Cathay Pacific
29 Sep Cathay Pacific
22 Sep Cathay Pacific
18 Sep Cathay Pacific
24 Sep Cathay Pacific
23 Sep Cathay Pacific
26 Sep Alaska Airlines

Also check the deals for return 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.

Book a cheap hotel in Bangkok

Cheap car rent in Bangkok

Feel free to contact us with any feedback or request another flight research.