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

Return flights

22 Oct - 29 Oct	United
03 Oct - 17 Oct	American Airlines
07 Oct - 11 Oct	American Airlines
16 Oct - 23 Oct	Delta
17 Oct - 19 Oct	American Airlines
10 Oct - 17 Oct	American Airlines
13 Oct - 17 Oct	American Airlines
11 Oct - 14 Oct	American Airlines
13 Oct - 20 Oct	American Airlines
03 Oct - 05 Oct	American Airlines
25 Oct - 02 Nov	United
15 Oct - 04 Nov	WestJet
21 Oct - 04 Nov	WestJet
22 Oct - 05 Nov	WestJet
28 Oct - 04 Nov	Alaska Airlines
29 Oct - 19 Nov	Alaska 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 $306

Return flights