Cheapest return flights from Ontario to Madrid in September from $639

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

Return flights

22 Sep - 09 Oct British Airways
30 Sep - 09 Oct British Airways
01 Sep - 10 Sep British Airways
07 Sep - 17 Sep British Airways
11 Sep - 25 Sep British Airways
20 Sep - 06 Oct Turkish Airlines
21 Sep - 02 Oct Turkish Airlines
20 Sep - 01 Oct Turkish Airlines
20 Sep - 07 Oct Turkish Airlines
21 Sep - 28 Sep Turkish Airlines
18 Sep - 05 Oct Turkish Airlines
06 Sep - 20 Sep Turkish Airlines
01 Sep - 13 Sep British Airways
13 Sep - 21 Sep jetBlue
09 Sep - 16 Sep jetBlue

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

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