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

Return flights

30 Aug - 05 Sep	Air Canada
27 Aug - 03 Sep	Air Transat
17 Aug - 23 Aug	Porter Airlines (Canada) Ltd
20 Aug - 27 Aug	Air Transat
26 Aug - 04 Sep	Air Transat
13 Aug - 20 Aug	Air Transat
13 Aug - 27 Aug	Air Transat
05 Aug - 20 Aug	Air Transat
12 Aug - 16 Aug	Air Transat
12 Aug - 19 Aug	Air Transat
07 Aug - 12 Aug	Air Transat
06 Aug - 11 Aug	Air Transat
15 Aug - 19 Aug	Air Transat
28 Aug - 01 Sep	Air Transat
27 Aug - 01 Sep	Air Transat

Also check the deals for one-way flights from Toronto to Cancun in August.

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 August from $381

Return flights