AirHint found the following cheapest return flights from Washington (IAD) to Calgary (YYC) in October 2026 (see full year).
Return flights
| 30 Oct - 04 Nov | Delta | ||
| 08 Oct - 13 Oct | Delta | ||
| 10 Oct - 12 Oct | Delta | ||
| 09 Oct - 12 Oct | Delta |
Also check the deals for one-way flights from Washington to Calgary in October.
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