AirHint found the following cheapest return flights from Chicago (ORD) to Calgary (YYC) in October 2026 (see full year).
Return flights
| 12 Oct - 16 Oct | WestJet | ||
| 08 Oct - 12 Oct | WestJet | direct | |
| 12 Oct - 19 Oct | Delta | ||
| 12 Oct - 16 Oct | American Airlines | direct | |
| 12 Oct - 19 Oct | Air Canada | direct |
Also check the deals for one-way flights from Chicago to Calgary in October.
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