Cheapest return flights from St. Louis to Cancun in March from $258

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

Return flights

01 Mar - 06 Mar Frontier Airlines direct
02 Mar - 04 Mar Frontier Airlines direct
03 Mar - 05 Mar Frontier Airlines direct
02 Mar - 06 Mar Frontier Airlines direct
01 Mar - 04 Mar Frontier Airlines direct
03 Mar - 11 Mar Frontier Airlines direct
03 Mar - 10 Mar Frontier Airlines
02 Mar - 10 Mar Frontier Airlines
25 Mar - 24 Apr Frontier Airlines direct
02 Mar - 11 Mar Frontier Airlines direct
02 Mar - 12 Mar Frontier Airlines
29 Mar - 02 Apr Frontier Airlines direct
17 Mar - 18 Apr Aeromexico
21 Mar - 18 Apr Frontier Airlines
17 Mar - 18 Apr Frontier Airlines direct

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

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