AirHint found the following cheapest return flights from Mexico City (MEX) to Toronto (YYZ) in September 2025 (see full year).

Return flights

19 Sep - 25 Sep	Viva
22 Sep - 06 Oct	Viva
29 Sep - 08 Oct	Volaris
22 Sep - 30 Sep	Volaris
23 Sep - 30 Sep	Viva
19 Sep - 27 Sep	Viva
18 Sep - 25 Sep	Viva
25 Sep - 02 Oct	Viva
23 Sep - 04 Oct	Viva
15 Sep - 30 Sep	Viva
26 Sep - 04 Oct	Volaris
19 Sep - 04 Oct	Viva
20 Sep - 27 Sep	Viva
25 Sep - 30 Sep	Viva
20 Sep - 30 Sep	Viva
26 Sep - 01 Oct	Volaris
23 Sep - 27 Sep	Volaris
26 Sep - 06 Oct	Volaris
26 Sep - 03 Oct	Viva
23 Sep - 07 Oct	Volaris

Also check the deals for one-way flights from Mexico City to Toronto in September.

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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Cheapest return flights from Mexico City to Toronto in September from $336

Return flights