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

Return flights

29 Mar - 03 Apr	Delta
19 Mar - 24 Mar	Delta
22 Mar - 26 Mar	Delta
13 Mar - 17 Mar	Delta
12 Mar - 17 Mar	Delta
13 Mar - 18 Mar	Delta
16 Mar - 20 Mar	Delta
14 Mar - 19 Mar	Delta
06 Mar - 13 Mar	Air Canada
07 Mar - 14 Mar	Delta
16 Mar - 21 Mar	Delta

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

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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Cheapest return flights from St. Louis to Cancun in March from 469€

Return flights