Zion Shuttle
The shuttle operates daily beginning at 6:30 a.m. every 30 minutes, increasing to every 15 minutes and then, during the busy part of the day, every 6 to 8 minutes. Toward evening shuttle times will scale back to 15 minutes, then to 30 minutes. The last bus will leave the Zion Canyon Visitor Center at 9:30 p.m. The schedule is subject to change. A complete round trip will take a minimum of 90 minutes. ONLY THE SCENIC DRIVE IS CLOSED TO PRIVATE VEHICLES - ALL OTHER ROADS IN THE PARK REMAIN OPEN TO PRIVATE VEHICLES.

Sky West Airlines
In total, SkyWest today provides over 800 daily flights to 65 cities in 13 western states and Canada with a fleet of cabin-class aircraft and is the nation's eighth largest regional airline.
http://www.skywest.com/