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

Return flights

01 Oct - 11 Oct	Delta
23 Oct - 06 Nov	British Airways
30 Oct - 13 Nov	Iberia
24 Oct - 07 Nov	Iberia
27 Oct - 10 Nov	British Airways
13 Oct - 23 Oct	Iberia
21 Oct - 10 Nov	British Airways
01 Oct - 15 Oct	Iberia
05 Oct - 15 Oct	Iberia
06 Oct - 14 Oct	Iberia
07 Oct - 15 Oct	Iberia
08 Oct - 15 Oct	Iberia
09 Oct - 15 Oct	Iberia
09 Oct - 14 Oct	Iberia
04 Oct - 14 Oct	Iberia
19 Oct - 02 Nov	British Airways

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

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 October from 530€

Return flights