St Louis to Cancun $242 Round-Trip on Southwest

On Southwest, fly from St Louis to Cancun for $242 round-trip.

Seen below, we found seats for departing STL on Wednesday, January 10, returning from CUN on Wednesday, January 17.

Other dates are also available for travel from November through March, excluding peak holiday periods.

See our fare details for booking info.

Need a room in Cancun? Here's what's available for the above dates on Hotelwatchdog.