Cheapest return flights from Ontario to Madrid in September from $600

Best time to book flights for Ontario (ONT) to Madrid (MAD) flights at AirHint

AirHint found the following cheapest return flights from Ontario (ONT) to Madrid (MAD) in September 2025 (see full year).

Return flights

17 Sep - 24 Sep British Airways
19 Sep - 23 Sep Iberia
19 Sep - 24 Sep Iberia
18 Sep - 25 Sep Iberia
02 Sep - 12 Sep Iberia
02 Sep - 09 Sep Iberia
09 Sep - 24 Sep Iberia
10 Sep - 24 Sep Iberia
10 Sep - 17 Sep Iberia
08 Sep - 23 Sep Iberia
17 Sep - 05 Oct British Airways
27 Sep - 04 Oct Iberia
26 Sep - 05 Oct British Airways
13 Sep - 04 Oct Iberia
16 Sep - 09 Oct Avianca

Also check the deals for one-way flights from Ontario to Madrid in September.

Skyscanner

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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