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

Return flights

06 Sep - 11 Sep	jetBlue
08 Sep - 23 Sep	jetBlue
08 Sep - 26 Sep	jetBlue
24 Sep - 02 Oct	Spirit Airlines
28 Sep - 05 Oct	Spirit Airlines
28 Sep - 05 Oct	Iberojet (Portugal)	direct
04 Sep - 15 Sep	jetBlue
21 Sep - 28 Sep	Spirit Airlines
25 Sep - 02 Oct	Aeromexico
23 Sep - 25 Sep	Aeromexico
07 Sep - 14 Sep	Flair Airlines
02 Sep - 11 Sep	Spirit Airlines
03 Sep - 20 Sep	Spirit Airlines
14 Sep - 19 Oct	Aeromexico
07 Sep - 14 Sep	Iberojet (Portugal)	direct
21 Sep - 05 Oct	Aeromexico
28 Sep - 19 Oct	jetBlue
01 Sep - 04 Oct	Iberojet
20 Sep - 08 Oct	Air Transat

Also check the deals for one-way flights from Cancun to Lisbon 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 Cancun to Lisbon in September from $742

Return flights