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

Return flights

01 Sep - 03 Sep	Volaris
12 Sep - 16 Sep	Volaris
10 Sep - 18 Sep	Viva Aerobus
09 Sep - 18 Sep	Viva Aerobus
23 Sep - 30 Sep	Viva Aerobus
19 Sep - 27 Sep	Viva Aerobus
22 Sep - 29 Sep	Viva Aerobus
17 Sep - 09 Oct	Aeromexico
22 Sep - 24 Sep	Volaris
02 Sep - 25 Sep	Viva Aerobus
10 Sep - 17 Sep	Viva Aerobus
30 Sep - 14 Oct	Arajet
18 Sep - 01 Oct	Viva Aerobus
29 Sep - 04 Oct	Viva Aerobus
26 Sep - 03 Oct	Viva Aerobus
13 Sep - 13 Oct	Volaris
30 Sep - 14 Oct	Air Canada	direct
29 Sep - 04 Oct	Air Canada	direct
17 Sep - 09 Oct	Aeromexico	direct
18 Sep - 01 Oct	Aeromexico	direct

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 $319

Return flights