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

Return flights

10 Dec - 14 Jan	Delta
01 Dec - 01 Dec	WestJet
11 Dec - 14 Dec	Delta
31 Dec - 07 Jan	Delta
26 Dec - 30 Dec	WestJet
10 Dec - 14 Jan	United	direct
18 Dec - 21 Dec	Delta
11 Dec - 11 Dec	Spirit Airlines
18 Dec - 21 Dec	United	direct
11 Dec - 14 Dec	United	direct
20 Dec - 30 Dec	Delta
24 Dec - 28 Dec	Delta
30 Dec - 02 Jan	Delta
30 Dec - 03 Jan	Delta
18 Dec - 18 Dec	United
25 Dec - 01 Jan	Delta
30 Dec - 02 Jan	Air Canada	direct
30 Dec - 03 Jan	Air Canada	direct

Also check the deals for one-way flights from Chicago to Calgary 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 Chicago to Calgary in December from 222€

Return flights