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

Return flights

25 Sep - 11 Oct	Air Canada
25 Sep - 02 Oct	SWISS
22 Sep - 29 Sep	British Airways
20 Sep - 27 Sep	Air Canada
19 Sep - 26 Sep	Air Canada
23 Sep - 30 Sep	Air Transat
21 Sep - 06 Oct	Ryanair
19 Sep - 22 Sep	Air Canada
21 Sep - 11 Oct	Air Canada
21 Sep - 28 Sep	Air Canada
27 Sep - 02 Oct	Air Canada
28 Sep - 05 Oct	Ryanair
22 Sep - 30 Sep	United
21 Sep - 22 Sep	Vueling Airlines

Also check the deals for one-way flights from Lisbon 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 Lisbon to Cancun in September from $630

Return flights