AirHint found the following cheapest return flights from Ontario (ONT) to Madrid (MAD) in October 2026 (see full year).

Return flights

27 Oct - 10 Nov	British Airways
19 Oct - 30 Oct	Iberia
20 Oct - 30 Oct	Iberia
20 Oct - 03 Nov	British Airways
12 Oct - 27 Oct	British Airways
18 Oct - 31 Oct	British Airways
19 Oct - 02 Nov	British Airways
12 Oct - 25 Oct	British Airways
25 Oct - 13 Nov	British Airways
26 Oct - 09 Nov	British Airways
05 Oct - 12 Oct	British Airways
12 Oct - 28 Oct	British Airways
15 Oct - 15 Nov	Iberia
15 Oct - 30 Oct	Iberia
25 Oct - 08 Nov	Iberia
19 Oct - 03 Nov	Iberia
11 Oct - 26 Oct	British Airways
19 Oct - 01 Nov	Iberia
12 Oct - 15 Nov	Iberia
06 Oct - 13 Oct	Iberia

Also check the deals for one-way flights from Ontario to Madrid 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 Madrid in October from $414

Return flights