AirHint found the following cheapest one-way flights from St. Louis (STL) to Cancun (CUN) in January 2026 (see full year).

One-Way flights

12 Jan	Frontier Airlines	direct
13 Jan	Frontier Airlines	direct
20 Jan	Frontier Airlines	direct
11 Jan	Frontier Airlines	direct
22 Jan	Frontier Airlines	direct
10 Jan	Frontier Airlines	direct
21 Jan	Frontier Airlines	direct
06 Jan	Frontier Airlines	direct
07 Jan	Frontier Airlines	direct
17 Jan	Frontier Airlines	direct

Also check the deals for return flights from St. Louis to Cancun in January.

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 St. Louis to Cancun in January from 97€

One-Way flights