Cheapest one-way flights from Ontario to Madrid in December from $331

AirHint found the following cheapest one-way flights from Ontario (ONT) to Madrid (MAD) in December 2025 (see full year).

One-Way flights

04 Dec Frontier Airlines
07 Dec British Airways
06 Dec British Airways
05 Dec British Airways
10 Dec British Airways
03 Dec British Airways
09 Dec Iberia
11 Dec British Airways
29 Dec SWISS
30 Dec Iberia

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

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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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