Cheapest return flights from Washington to Toronto in December from $361

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

Return flights

29 Dec - 12 Jan Air Canada direct
24 Dec - 05 Jan Allegiant Air
29 Dec - 31 Dec Air Canada direct
29 Dec - 30 Dec Air Canada direct
25 Dec - 07 Jan Frontier Airlines
31 Dec - 02 Jan Air Canada direct
30 Dec - 01 Jan Air Canada direct
23 Dec - 04 Jan Allegiant Air
25 Dec - 01 Jan Frontier Airlines
25 Dec - 01 Jan Air Canada direct
30 Dec - 02 Jan Air Canada direct
21 Dec - 01 Jan Allegiant Air
25 Dec - 27 Dec Air Canada direct
23 Dec - 26 Dec Air Canada direct
22 Dec - 27 Dec Air Canada direct
26 Dec - 30 Dec Air Canada direct
27 Dec - 29 Dec United direct
25 Dec - 29 Dec Frontier Airlines
26 Dec - 29 Dec Air Canada direct
25 Dec - 31 Dec Air Canada direct

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

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