Cheapest return flights from Chicago to Bangkok in September from 593€

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

Return flights

25 Sep - 06 Oct Cathay Pacific
04 Sep - 11 Sep United
08 Sep - 17 Sep United
23 Sep - 22 Oct Cathay Pacific
08 Sep - 24 Sep ANA
08 Sep - 15 Sep ANA
15 Sep - 25 Sep ANA
09 Sep - 16 Sep ANA
01 Sep - 07 Sep Cathay Pacific
10 Sep - 17 Sep ANA
09 Sep - 14 Sep Cathay Pacific
02 Sep - 07 Sep ANA
26 Sep - 31 Oct Cathay Pacific
29 Sep - 01 Oct ANA
22 Sep - 06 Oct United
26 Sep - 04 Oct Delta
27 Sep - 03 Oct Delta

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

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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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