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

Return flights

17 Oct - 24 Oct	WestJet	direct
03 Oct - 06 Oct	WestJet
20 Oct - 27 Oct	United
21 Oct - 28 Oct	United
28 Oct - 18 Nov	United
28 Oct - 11 Nov	United
29 Oct - 12 Nov	United
29 Oct - 11 Nov	United
04 Oct - 11 Oct	WestJet
20 Oct - 26 Oct	United
13 Oct - 19 Oct	WestJet
19 Oct - 24 Oct	Spirit Airlines
25 Oct - 03 Nov	United
22 Oct - 29 Oct	United
14 Oct - 21 Oct	Spirit Airlines

Also check the deals for one-way flights from Boston 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 Boston to Calgary in October from $133

Return flights