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

Return flights

30 Sep - 14 Oct	Iberia
11 Sep - 18 Sep	Iberia
16 Sep - 24 Sep	Iberia
16 Sep - 25 Sep	Iberia
02 Sep - 18 Sep	Iberia
16 Sep - 23 Sep	Iberia
09 Sep - 23 Sep	Iberia
15 Sep - 25 Sep	Iberia
02 Sep - 11 Sep	Iberia
23 Sep - 03 Oct	Iberia
06 Sep - 14 Sep	British Airways
06 Sep - 19 Sep	Iberia
30 Sep - 10 Oct	British Airways
30 Sep - 08 Oct	Iberia
29 Sep - 11 Oct	British Airways
25 Sep - 03 Oct	Iberia
25 Sep - 09 Oct	Iberia
26 Sep - 03 Oct	Iberia
12 Sep - 03 Oct	Iberia
28 Sep - 03 Oct	Iberia

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 637€

Return flights