Frontier Airlines is a wholly-owned subsidiary of Republic Airways Holdings Inc. It is a low-fare airline that provides service from its Denver hub to over 50 destinations in the United States, Costa Rica and Mexico. Frontier is the second- largest carrier out of Denver International Airport, with more than 300 daily system-wide departures and arrivals. Service features include advanced seat assignments, electronic ticketing, curbside check-in, online check-in and the EarlyReturns® mileage program. The airline currently operates a fleet of 51 aircraft including 38 Airbus A319s, 9 Airbus A318s and four Airbus A320s.

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