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

Return flights

09 Sep - 16 Sep	United
15 Sep - 22 Sep	United
03 Sep - 10 Sep	Air Europa
06 Sep - 14 Sep	Ryanair
09 Sep - 13 Sep	Air Canada
07 Sep - 14 Sep	Air Europa
21 Sep - 28 Sep	Air Europa
20 Sep - 28 Sep	Air Europa
26 Sep - 29 Sep	Air Transat
25 Sep - 27 Sep	Ryanair

Also check the deals for one-way flights from Porto 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 Porto to Cancun in September from 540€

Return flights