Frontier Airlines: Select One-Way Domestic Flights for only $15 The links in the post below may be affiliate links. Read the full disclosure Here.August 30, 2017 by laurie Leave a CommentFrontier Airlines is offering Select One-Way Domestic Flights for only $15! Valid for travel on Tuesday or Wednesday only through 11/15/2017. Please note that availability will vary by date/route.Seats on each flight are limited so search and book quickly.Join our PRIVATE FACEBOOK PAGE here so that you are sure to NEVER miss another one of our deals! Be sure to turn on your notifications!