Cheapest return flights from Boston to Calgary in December from $237

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

Return flights

05 Dec - 10 Dec Frontier Airlines
05 Dec - 08 Dec Frontier Airlines
05 Dec - 07 Dec Frontier Airlines
06 Dec - 09 Dec Delta
31 Dec - 07 Jan Frontier Airlines
25 Dec - 09 Jan Frontier Airlines
20 Dec - 04 Jan Frontier Airlines
23 Dec - 28 Dec Spirit Airlines
21 Dec - 04 Jan Frontier Airlines
20 Dec - 25 Dec Delta
14 Dec - 03 Jan WestJet

Also check the deals for one-way flights from Boston to Calgary in December.

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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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