AirHint found the following cheapest one-way flights from Atlanta (ATL) to Cancun (CUN) in September 2025 (see full year).

One-Way flights

05 Sep	Spirit Airlines
18 Sep	Spirit Airlines
28 Sep	Spirit Airlines
07 Sep	Spirit Airlines
22 Sep	Spirit Airlines
11 Sep	Spirit Airlines
02 Sep	Spirit Airlines
03 Sep	Spirit Airlines
30 Sep	Spirit Airlines
23 Sep	Spirit Airlines

Also check the deals for return flights from Atlanta 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 one-way flights from Atlanta to Cancun in September from 98€

One-Way flights