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

Return flights

20 Aug - 27 Aug	Turkish Airlines
20 Aug - 26 Aug	British Airways
13 Aug - 17 Sep	Air Transat
14 Aug - 18 Sep	British Airways
13 Aug - 18 Sep	Air Europa
13 Aug - 20 Aug	Air Transat
24 Aug - 04 Sep	Ryanair
12 Aug - 19 Aug	Air Transat
26 Aug - 28 Aug	Air Europa
26 Aug - 04 Sep	Air Europa
25 Aug - 08 Sep	United
15 Aug - 21 Aug	KLM
26 Aug - 06 Sep	British Airways
18 Aug - 26 Aug	British Airways
23 Aug - 27 Aug	Ryanair
19 Aug - 23 Aug	SWISS
18 Aug - 27 Aug	Air France
25 Aug - 01 Sep	Ryanair

Also check the deals for one-way flights from Porto 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 Porto to Cancun in August from $906

Return flights