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

Return flights

06 Sep - 18 Sep	American Airlines
12 Sep - 17 Sep	jetBlue
05 Sep - 17 Sep	SWISS
04 Sep - 07 Sep	SWISS
07 Sep - 20 Sep	SWISS
11 Sep - 18 Sep	Iberia
10 Sep - 14 Sep	British Airways
07 Sep - 14 Sep	SWISS
08 Sep - 14 Sep	SWISS
12 Sep - 14 Sep	SWISS
17 Sep - 03 Oct	SWISS
20 Sep - 03 Oct	Iberia
24 Sep - 03 Oct	SWISS
27 Sep - 11 Oct	SWISS
20 Sep - 11 Oct	SWISS
17 Sep - 11 Oct	SWISS
23 Sep - 03 Oct	British Airways
18 Sep - 11 Oct	SWISS
23 Sep - 18 Oct	British Airways
19 Sep - 11 Oct	SWISS

Also check the deals for one-way flights from Ontario to Rome in September.

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 September from $519

Return flights