The Winter Park Express (Amtrak operated) advertises an efficient airport connection via Denver's RTD light rail. Maybe a United Airlines direct bus connection from the airport to the ski resort might is a little faster and cheaper.
"PLANE TO TRAIN: Seamless rail connectivity gives travelers passage from the airport to the Winter Park Express and on to Winter Park Resort, without having to rent a car, secure a shuttle, or navigate mountain roads. From Denver International Airport, take the A-Line to Union Station in Downtown Denver."
[
www.winterparkresort.com]