Frontier Airlines has announced it will expand on its existing annual summer seasonal nonstop service between Denver and Jackson Hole with the addition of a winter schedule beginning February 13th. The Denver-based carrier will then operateone flight each on Wednesdays and Sundays through April 7th. Then, Frontier’s summer season service in Jackson Hole will resume in May. Frontier’s Jackson Hole service operates on 138-seat Airbus 319 aircraft. The company says Fares as low as $99* each way are available online through the company through November 18th.