Cheapest return flights from St. Louis to Cancun in May from $257

AirHint found the following cheapest return flights from St. Louis (STL) to Cancun (CUN) in May 2026 (see full year).

Return flights

05 May - 13 May Frontier Airlines direct
05 May - 08 May Frontier Airlines direct
05 May - 11 May Frontier Airlines
06 May - 11 May Frontier Airlines
03 May - 08 May Frontier Airlines direct
05 May - 09 May Frontier Airlines direct
08 May - 12 May Frontier Airlines direct
05 May - 10 May Frontier Airlines direct
05 May - 11 May Frontier Airlines direct
06 May - 11 May Frontier Airlines direct
31 May - 07 Jun Air Canada
31 May - 07 Jun Frontier Airlines direct

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

Powered by

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.

Book a cheap hotel in Cancun

Cheap car rent in Cancun

Feel free to contact us with any feedback or request another flight research.