Cheapest one-way flights from Ontario to Madrid in April from $368

AirHint found the following cheapest one-way flights from Ontario (ONT) to Madrid (MAD) in April 2026 (see full year).

One-Way flights

28 Apr British Airways
21 Apr British Airways
20 Apr British Airways
02 Apr Frontier Airlines
26 Apr British Airways
25 Apr British Airways
22 Apr Iberia
03 Apr Frontier Airlines
30 Apr British Airways
23 Apr British Airways

Also check the deals for return flights from Ontario to Madrid in April.

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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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