Frontier Airlines is launching twice-weekly, nonstop flights between Denver and Eagle County Regional Airport — just over 30 miles from Vail Ski Resort — this December, the airline announced Tuesday. Related Articles Airlines | Coolcations, solo travel and other hot tourism trends Airlines | Frontier Airlines flight attendants vote to authorize strike Airlines | Short-term parking areas at DIA to shift next week for power cleaning Airlines | United Airlines cuts deal with Elon Musk’s Starlink to offer free in-flight Wi-Fi Airlines | Meow Wolf is Denver International Airport’s newest, weirdest arrival The first Eagle-County-bound flight will take off from Denver International Airport on Dec.