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.
Flights to Salt Lake City. You can find cheap flights to Salt Lake City with Orbitz.com. Continental, Delta, Frontier, American, JetBlue, United, Southwest and US Airways offer service to Utah through Salt Lake City International Airport (SLC), which is five miles northwest of the downtown area.