Frontier Airlines Sale: Fly Across the US for $19 One Way by Julien Bortz | Jan 31, 2019 | Blog Posts | 0 comments Frontier Airlines is having a two day flash sale with fares starting as low as $19.30 one way! Use the following link to find various destinations: Frontier Airlines SALE Submit a Comment Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Notify me of follow-up comments by email. Notify me of new posts by email.