On this continuum, the level of professional skepticism moves from something less than complete trust, to a neutral mind-set, to presumptive doubt, and all the way to complete doubt. The appropriate level of skepticism to apply is initially determined only after a careful and rigorous risk assessment.
1 The longest flying aircraft flying from Kansas City, MO to Cancun, Mexico during the 2009 year was a AirbusNdustrie's A319 flown by Frontier.  Back in 2009 there was just one airline company operating flights between Kansas City and Cancun.
The Cancun International Airport also has regular departures (every 30 minutes) from each terminal. A bus ride from the airport to the main downtown station is under 20 minutes. From there you can easily catch a taxi (or even a city bus) to get to your hotel.