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Cheapest one-way flights from St. Louis (STL) to Cancun (CUN), August

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Dates, airline, and price
Dates	Airline	Price
15 Aug	Frontier Airlines
12 Aug	Frontier Airlines
07 Aug	Frontier Airlines
02 Aug	Frontier Airlines
02 Aug	Southwest Airlines Direct Flight
15 Aug	Frontier Airlines Direct Flight
12 Aug	Frontier Airlines Direct Flight
07 Aug	Frontier Airlines Direct Flight

deals for return flights from St. Louis to Cancun in August.

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Updated Jul 13, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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Cheapest one-way flights from St. Louis (STL) to Cancun (CUN), August

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