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

Return flights

20 Sep - 04 Oct	Ryanair
24 Sep - 04 Oct	Ryanair
22 Sep - 29 Sep	American Airlines
21 Sep - 28 Sep	American Airlines
25 Sep - 01 Oct	American Airlines
24 Sep - 01 Oct	American Airlines
25 Sep - 05 Oct	American Airlines
18 Sep - 28 Sep	Ryanair
16 Sep - 26 Sep	Ryanair
16 Sep - 25 Sep	Ryanair
16 Sep - 23 Sep	Ryanair
15 Sep - 21 Sep	Ryanair
18 Sep - 25 Sep	Ryanair
15 Sep - 29 Sep	Ryanair
19 Sep - 27 Sep	Air Transat
28 Sep - 02 Oct	Ryanair

Also check the deals for one-way flights from Dublin 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 Dublin to Cancun in September from 550€

Return flights