Cheapest return flights from St. Louis to Cancun in March from $348

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

Return flights

17 Mar - 24 Mar Aeromexico
04 Mar - 09 Mar Frontier Airlines
08 Mar - 12 Mar Aeromexico
18 Mar - 25 Mar Aeromexico
01 Mar - 31 Mar Aeromexico
07 Mar - 08 Mar Frontier Airlines
05 Mar - 08 Mar Frontier Airlines direct
01 Mar - 31 Mar Frontier Airlines direct
07 Mar - 15 Mar Frontier Airlines
26 Mar - 30 Mar Frontier Airlines direct

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

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