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

Return flights

04 Oct - 11 Oct	WestJet
20 Oct - 24 Oct	WestJet	direct
11 Oct - 24 Oct	WestJet	direct
04 Oct - 11 Oct	WestJet	direct
05 Oct - 12 Oct	WestJet
10 Oct - 17 Oct	WestJet	direct
28 Oct - 04 Nov	United
28 Oct - 11 Nov	United
29 Oct - 12 Nov	United
28 Oct - 05 Nov	United
28 Oct - 12 Nov	United
28 Oct - 20 Nov	United
29 Oct - 04 Nov	United
29 Oct - 05 Nov	United
17 Oct - 24 Oct	WestJet	direct
21 Oct - 28 Oct	United
04 Oct - 06 Oct	WestJet
06 Oct - 13 Oct	WestJet
20 Oct - 16 Nov	WestJet
20 Oct - 05 Nov	WestJet

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 115€

Return flights