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Cheapest return flights from St. Louis (STL) to Cancun (CUN), July

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Dates, airline, and price
Dates	Airline	Price
21 Jul 26 Jul	Frontier Airlines
18 Jul 25 Jul	Frontier Airlines
30 Jul 02 Aug	Frontier Airlines
10 Jul 13 Jul	Frontier Airlines
21 Jul 26 Jul	Frontier Airlines Direct Flight
17 Jul 20 Jul	Frontier Airlines
07 Jul 11 Jul	Frontier Airlines
07 Jul 11 Jul	Volaris Direct Flight
18 Jul 25 Jul	Southwest Airlines Direct Flight

deals for one-way flights from St. Louis to Cancun in July.

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Updated Jul 4, 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 return flights from St. Louis (STL) to Cancun (CUN), July

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