AirHint found the following cheapest return flights from Quebec (YQB) to Chicago (ORD) in October 2025 (see full year).
Return flights
| 31 Oct - 03 Nov | Air Transat | ||
| 31 Oct - 08 Nov | United | ||
| 30 Oct - 02 Nov | United | ||
| 25 Oct - 30 Oct | United | direct | |
| 22 Oct - 26 Oct | United | ||
| 24 Oct - 27 Oct | United | ||
| 22 Oct - 26 Oct | United | direct |
Also check the deals for one-way flights from Quebec to Chicago in October.
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