Cheapest return flights from Boston to Toronto in December from $255

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

Return flights

14 Dec - 09 Jan Spirit Airlines
06 Dec - 13 Dec Spirit Airlines
06 Dec - 08 Dec Spirit Airlines
28 Dec - 11 Jan Porter Airlines (Canada) Ltd
28 Dec - 08 Jan Porter Airlines (Canada) Ltd
28 Dec - 17 Jan Porter Airlines (Canada) Ltd
28 Dec - 15 Jan Porter Airlines (Canada) Ltd
28 Dec - 10 Jan Porter Airlines (Canada) Ltd
16 Dec - 23 Dec Spirit Airlines
13 Dec - 18 Jan Spirit Airlines
28 Dec - 13 Jan Porter Airlines (Canada) Ltd
28 Dec - 18 Jan Porter Airlines (Canada) Ltd
28 Dec - 09 Jan Porter Airlines (Canada) Ltd
07 Dec - 14 Dec Spirit Airlines
08 Dec - 15 Dec Spirit Airlines
11 Dec - 15 Dec Spirit Airlines
18 Dec - 25 Dec Allegiant Air
17 Dec - 23 Dec Porter Airlines (Canada) Ltd
17 Dec - 24 Dec Spirit Airlines
23 Dec - 30 Dec Porter Airlines (Canada) Ltd

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

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