Cheapest one-way flights from St. Louis to Cancun in March from $177

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

One-Way flights

18 Mar Air Canada
31 Mar Air Canada
01 Mar Frontier Airlines direct
02 Mar Frontier Airlines direct
03 Mar Frontier Airlines direct
04 Mar Frontier Airlines direct
05 Mar Frontier Airlines direct
06 Mar Frontier Airlines direct
08 Mar Frontier Airlines direct
09 Mar Frontier Airlines direct

Also check the deals for return flights from St. Louis to Cancun in March.

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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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