AirHint found the following cheapest return flights from Toronto (YTZ) to Cancun (CUN) in September 2025 (see full year).

Return flights

07 Sep - 09 Sep	Air Canada
29 Sep - 01 Oct	Air Canada
30 Sep - 08 Oct	Air Transat
08 Sep - 01 Oct	Air Transat
24 Sep - 29 Sep	Air Transat
13 Sep - 17 Sep	Air Transat
01 Sep - 13 Sep	Air Canada
01 Sep - 20 Sep	Air Canada
07 Sep - 01 Oct	Air Transat
11 Sep - 18 Sep	Air Canada
09 Sep - 16 Sep	Air Transat
25 Sep - 28 Sep	Air Canada
13 Sep - 16 Sep	Air Transat
23 Sep - 29 Sep	Air Transat
07 Sep - 02 Oct	Air Transat
07 Sep - 03 Oct	Air Transat
28 Sep - 03 Oct	Air Transat
07 Sep - 04 Oct	Air Transat
26 Sep - 03 Oct	Air Transat
11 Sep - 04 Oct	Air Transat

Also check the deals for one-way flights from Toronto to Cancun 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 Toronto to Cancun in September from $298

Return flights