AirHint found the following cheapest return flights from Ontario (ONT) to Rome (FCO) in December 2025 (see full year).

Return flights

11 Dec - 15 Dec	British Airways
08 Dec - 17 Dec	KLM
05 Dec - 08 Dec	British Airways
11 Dec - 18 Dec	British Airways
03 Dec - 12 Dec	Iberia
03 Dec - 08 Dec	British Airways
04 Dec - 12 Dec	British Airways
05 Dec - 12 Dec	British Airways
12 Dec - 18 Dec	Iberia
05 Dec - 14 Dec	British Airways
27 Dec - 03 Jan	Iberia
11 Dec - 03 Jan	British Airways
12 Dec - 03 Jan	British Airways
29 Dec - 03 Jan	Iberia
28 Dec - 03 Jan	Iberia
11 Dec - 06 Jan	British Airways
26 Dec - 02 Jan	Frontier Airlines
27 Dec - 02 Jan	Frontier Airlines
13 Dec - 03 Jan	Iberia
20 Dec - 09 Jan	Iberia

Also check the deals for one-way flights from Ontario to Rome 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 Ontario to Rome in December from $505

Return flights