Cheapest return flights from St. Louis to Cancun in October from $243

AirHint found the following cheapest return flights from St. Louis (STL) to Cancun (CUN) in October 2025 (see full year).

Return flights

06 Oct - 10 Oct Frontier Airlines direct
04 Oct - 09 Oct Frontier Airlines direct
03 Oct - 14 Oct Frontier Airlines direct
31 Oct - 05 Nov Frontier Airlines
30 Oct - 02 Nov Spirit Airlines
29 Oct - 02 Nov Aeromexico
31 Oct - 05 Nov Frontier Airlines direct
16 Oct - 22 Oct Aeromexico
16 Oct - 21 Oct Spirit Airlines
29 Oct - 02 Nov Frontier Airlines direct
30 Oct - 02 Nov Frontier Airlines direct
16 Oct - 21 Oct Frontier Airlines direct
16 Oct - 22 Oct Frontier Airlines direct

Also check the deals for one-way flights from St. Louis to Cancun in October.

Skyscanner

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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