AirHint found the following cheapest one-way flights from Chicago (ORD) to Mexico City (MEX) in September 2026 (see full year).
One-Way flights
| 07 Sep | Viva | ||
| 28 Sep | Viva | ||
| 29 Sep | Viva | ||
| 08 Sep | Viva | ||
| 03 Sep | Viva | direct | |
| 26 Sep | Viva | direct | |
| 14 Sep | Volaris | ||
| 27 Sep | Viva | direct | |
| 02 Sep | Viva | direct | |
| 28 Sep | Viva | direct |
Also check the deals for return flights from Chicago to Mexico City in September.
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