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

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

One-Way flights

03 May British Airways
10 May British Airways
05 May British Airways
06 May British Airways
08 May British Airways
09 May British Airways
07 May British Airways
13 May British Airways
11 May British Airways
12 May British Airways

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

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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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