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

Return flights

04 Sep - 08 Sep	Air Canada
14 Sep - 29 Sep	Air Canada
14 Sep - 22 Sep	Air Canada
07 Sep - 22 Sep	Air Canada
04 Sep - 15 Sep	Air Canada
19 Sep - 27 Sep	SWISS
12 Sep - 23 Sep	United
15 Sep - 21 Sep	United
11 Sep - 27 Sep	Air Canada
15 Sep - 29 Sep	United
10 Sep - 03 Oct	Air Europa
12 Sep - 03 Oct	Air Europa
11 Sep - 03 Oct	Air Europa
26 Sep - 03 Oct	Air Europa
16 Sep - 01 Oct	KLM
30 Sep - 07 Oct	British Airways
25 Sep - 03 Oct	Air Europa
30 Sep - 10 Oct	Air Europa
28 Sep - 10 Oct	Air Europa
29 Sep - 10 Oct	Air Europa

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 476€

Return flights