AirHint found the following cheapest return flights from St. Louis (STL) to Cancun (CUN) in April 2026 (see full year).
Return flights
| 18 Apr - 20 Apr | Air Canada | ||
| 17 Apr - 20 Apr | Air Canada | ||
| 24 Apr - 27 Apr | United |
Also check the deals for one-way flights from St. Louis to Cancun in April.
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