AirHint found the following cheapest return flights from Ontario (ONT) to Rome (FCO) in May 2026 (see full year).

Return flights

05 May - 27 May	British Airways
07 May - 18 May	British Airways
16 May - 23 May	British Airways
15 May - 22 May	Iberia
15 May - 21 May	Iberia
16 May - 30 May	British Airways
16 May - 06 Jun	British Airways
13 May - 25 May	British Airways
17 May - 31 May	Iberia
29 May - 13 Jun	jetBlue
27 May - 10 Jun	British Airways
30 May - 13 Jun	jetBlue
24 May - 31 May	British Airways

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

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 May from 678€

Return flights