Cheapest return flights from Chicago to Bangkok in September from 594€

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

Return flights

04 Sep - 10 Sep United
04 Sep - 11 Sep United
04 Sep - 16 Sep United
08 Sep - 22 Sep United
02 Sep - 23 Sep United
08 Sep - 15 Sep United
29 Sep - 06 Oct United
01 Sep - 10 Sep ANA
01 Sep - 09 Sep ANA
23 Sep - 22 Oct ANA
01 Sep - 11 Sep ANA
22 Sep - 30 Sep Cathay Pacific
28 Sep - 12 Oct ANA
29 Sep - 14 Oct Delta

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.

Book a cheap hotel in Bangkok

Cheap car rent in Bangkok

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