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

Return flights

31 Dec - 06 Jan	Air Canada	direct
30 Dec - 05 Jan	Air Canada	direct
31 Dec - 05 Jan	Air Canada	direct
31 Dec - 01 Jan	Air Canada	direct
29 Dec - 31 Dec	Air Canada	direct
28 Dec - 29 Dec	Air Canada	direct
26 Dec - 28 Dec	Air Canada	direct
29 Dec - 05 Jan	jetBlue
30 Dec - 01 Jan	WestJet
30 Dec - 01 Jan	United	direct
31 Dec - 02 Jan	Air Canada	direct
30 Dec - 02 Jan	United	direct
28 Dec - 04 Jan	WestJet
26 Dec - 31 Dec	WestJet
26 Dec - 30 Dec	WestJet
25 Dec - 31 Dec	WestJet
26 Dec - 27 Dec	WestJet
27 Dec - 29 Dec	WestJet
25 Dec - 29 Dec	WestJet
26 Dec - 26 Dec	WestJet

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

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 Washington to Toronto in December from $433

Return flights