The sale isn't just limited to a part of the country, either. Cities with tickets under $40 include Albuquerque, Atlanta, Austin, Bismarck, Charlotte, Chicago, Cincinnati, Colorado Springs, Columbus, Dallas, Denver, Des Moines, Fort Myers, Houston, Indianapolis, Kansas City, Knoxville, Las Vegas, Nashville, New Orleans, New York, Madison, Miami, Milwaukee, Oklahoma City, Omaha, Ontario, Orlando, Philadelphia, Phoenix, Pittsburgh, Raleigh, Reno, Saint Louis, Salt Lake City, San Antonio, San Diego, San Francisco, San Jose, Tampa, Trenton, and Washington D.C.
There are a lot of deals, but it's worth knowing what you're getting into. Frontier is a budget airline, and in 2016 it had an unimpressive 62.4% on-time arrival rate. So, this isn't quite like the recent deal where Southwest offered $42 tickets, which included two checked bags. But if you want to fly for less than it'll cost you to drive somewhere, this sale can make it happen.