Cheapest return flights from Ontario to Madrid in September from $419

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

Return flights

20 Sep - 30 Sep British Airways
21 Sep - 12 Oct British Airways
07 Sep - 22 Sep British Airways
13 Sep - 21 Sep British Airways
07 Sep - 21 Sep British Airways
20 Sep - 06 Oct British Airways
03 Sep - 22 Sep British Airways
10 Sep - 22 Sep British Airways
06 Sep - 14 Sep British Airways
14 Sep - 06 Oct British Airways
20 Sep - 29 Sep British Airways
03 Sep - 21 Sep British Airways
02 Sep - 30 Sep British Airways
11 Sep - 06 Oct British Airways
04 Sep - 11 Oct British Airways
28 Sep - 13 Oct jetBlue
14 Sep - 05 Oct jetBlue
30 Sep - 18 Oct Turkish Airlines
11 Sep - 18 Oct Turkish Airlines

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

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