AirHint found the following cheapest return flights from Chicago (ORD) to Bangkok (BKK) in September 2026 (see full year).
Return flights
| 01 Sep - 14 Sep | Korean Air | ||
| 05 Sep - 12 Sep | Etihad Airways | ||
| 18 Sep - 22 Sep | Delta | ||
| 26 Sep - 06 Oct | Delta |
Also check the deals for one-way flights from Chicago to Bangkok in September.
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