Cheapest return flights from Chicago to Toronto in December from $324

AirHint found the following cheapest return flights from Chicago (ORD) to Toronto (YTZ) in December 2025 (see full year).

Return flights

10 Dec - 17 Dec Spirit Airlines
11 Dec - 18 Jan Spirit Airlines
17 Dec - 07 Jan Spirit Airlines
11 Dec - 19 Jan Spirit Airlines
12 Dec - 19 Jan Frontier Airlines
24 Dec - 10 Jan Spirit Airlines
31 Dec - 02 Jan Spirit Airlines
18 Dec - 02 Jan Spirit Airlines
22 Dec - 29 Dec Spirit Airlines
21 Dec - 28 Dec Spirit Airlines
22 Dec - 28 Dec Spirit Airlines
30 Dec - 04 Jan Spirit Airlines
30 Dec - 02 Jan Spirit Airlines
27 Dec - 02 Jan Spirit Airlines

Also check the deals for one-way flights from Chicago to Toronto 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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