Cheapest return flights from Philadelphia to Montreal in December from $277

AirHint found the following cheapest return flights from Philadelphia (PHL) to Montreal (YUL) in December 2025 (see full year).

Return flights

11 Dec - 15 Dec Frontier Airlines
16 Dec - 06 Jan Frontier Airlines
07 Dec - 09 Dec Spirit Airlines
04 Dec - 07 Dec Spirit Airlines
11 Dec - 13 Dec Frontier Airlines
09 Dec - 05 Jan Frontier Airlines
25 Dec - 18 Jan Frontier Airlines
14 Dec - 16 Dec Spirit Airlines
25 Dec - 30 Dec Frontier Airlines
25 Dec - 29 Dec Frontier Airlines
07 Dec - 09 Dec Air Canada direct
04 Dec - 07 Dec American Airlines direct
11 Dec - 13 Dec Air Canada direct
09 Dec - 05 Jan Air Canada direct
25 Dec - 18 Jan Air Canada direct
26 Dec - 02 Jan Frontier Airlines
16 Dec - 06 Jan Porter Airlines (Canada) Ltd direct
23 Dec - 02 Jan jetBlue
26 Dec - 02 Jan American Airlines direct

Also check the deals for one-way flights from Philadelphia to Montreal in December.

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