Cheapest return flights from St. Louis to Cancun in December from $287

AirHint found the following cheapest return flights from St. Louis (STL) to Cancun (CUN) in December 2025 (see full year).

Return flights

07 Dec - 11 Dec Aeromexico
07 Dec - 12 Dec Aeromexico
04 Dec - 11 Dec Aeromexico
10 Dec - 15 Dec Aeromexico
04 Dec - 10 Dec Aeromexico
05 Dec - 10 Dec Aeromexico
05 Dec - 10 Dec Frontier Airlines direct
07 Dec - 12 Dec Southwest Airlines direct
04 Dec - 10 Dec Frontier Airlines direct
04 Dec - 11 Dec Southwest Airlines direct
21 Dec - 03 Jan Frontier Airlines

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

Skyscanner

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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