Frontier Airlines does not have a standalone application specifically for managing EarlyReturns accounts. However, customers can access their EarlyReturns account through the main Frontier Airlines mobile app, which is designed to assist with travel-related tasks, such as booking flights, checking flight status, and managing their travel itineraries. In the app, users may also be able to track their miles, view their rewards, and access account information. For the most current information and to ensure you have the latest features, it is advisable to check the official Frontier Airlines website or the app store for app details and updates. The mobile app serves as a convenient tool for frequent travelers and helps streamline their experience with Frontier Airlines.