AirHint found the following cheapest return flights from Washington (IAD) to Calgary (YYC) in October 2025 (see full year).

Return flights

10 Oct - 17 Oct	WestJet	direct
03 Oct - 17 Oct	WestJet	direct
06 Oct - 17 Oct	WestJet	direct
03 Oct - 13 Oct	WestJet
10 Oct - 16 Oct	WestJet
10 Oct - 24 Oct	WestJet
06 Oct - 14 Oct	WestJet
06 Oct - 12 Oct	WestJet
10 Oct - 12 Oct	WestJet
08 Oct - 17 Oct	Frontier Airlines

Also check the deals for one-way flights from Washington to Calgary in October.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Washington to Calgary in October from $206

Return flights