AirHint found the following cheapest one-way flights from St. Louis (STL) to Cancun (CUN) in May 2026 (see full year).
One-Way flights
| 29 May | Frontier Airlines | ||
| 09 May | Frontier Airlines | ||
| 29 May | Frontier Airlines | direct | |
| 05 May | Air Canada | ||
| 04 May | Air Canada | ||
| 05 May | Frontier Airlines | direct | |
| 04 May | Volaris | direct |
Also check the deals for return flights from St. Louis to Cancun in May.
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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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