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

Return flights

03 Oct - 08 Oct	American Airlines
02 Oct - 08 Oct	American Airlines
27 Oct - 31 Oct	United
10 Oct - 17 Oct	American Airlines
02 Oct - 27 Oct	jetBlue
18 Oct - 24 Oct	Alaska Airlines
30 Oct - 18 Nov	WestJet
22 Oct - 18 Nov	WestJet
01 Oct - 11 Oct	Alaska Airlines
01 Oct - 07 Oct	Alaska Airlines
28 Oct - 09 Nov	WestJet
01 Oct - 22 Oct	Alaska Airlines
01 Oct - 26 Oct	Alaska Airlines
28 Oct - 06 Nov	WestJet
18 Oct - 14 Nov	WestJet
22 Oct - 08 Nov	WestJet
29 Oct - 22 Nov	WestJet

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 $270

Return flights