It appears that Frontier's massive expansion this spring was a bit too ambitious. They will discontinue service on 5 routes in early July, which began service just last month. Along with this news, they are also having a $39 round-trip sale for travel this spring on around 50 routes (counting both directions).
Following are the nonstop routes being discontinued during the first week of July and the current lowest available fare on each route. Take advantage of these great fares while you still can!
Service ending July 4, 2018
Birmingham to Philadelphia $39 round-trip
Minneapolis to Long Island-Islip $53 round-trip
Providence to Austin $77 round-trip
Service ending July 5, 2018
Detroit to Long Island-Islip $49 round-trip
Atlanta to Providence $67 round-trip
Frontier also has a spring sale with around 50 routes (counting both directions) at just $39 round-trip. Availability is limited so you must be somewhat flexible to find the lowest price. Travel days will vary by route, but fares are generally available for travel through June 6, with a 3-day advance purchase required. Many routes have limited frequencies so be sure to check out the specifics in the fare details on your route.
Tickets must be booked by 11:59 pm ET on May 9, 2018, or before seats sell out.
A sample of nonstop fares include:
Providence to Charlotte $37 round-trip
San Jose to Las Vegas $39 round-trip
Atlanta to Orlando $39 round-trip
Cincinnati to Raleigh $39 round-trip
Grand Rapids to Philadelphia $39 round-trip
Philadelphia to Milwaukee $39 round-trip
Philadelphia to Charleston $39 round-trip
Chicago to Long Island-Islip $39 round-trip
Orlando to New Orleans $39 round-trip
Omaha to Austin $39 round-trip
Austin to Albuquerque $39 round-trip
Philadelphia to Savannah $39 round-trip
Trenton to Charleston $39 round-trip
Trenton to Myrtle Beach $39 round-trip
Raleigh to Providence $39 round-trip
These fares all work in reverse and there are many more routes under $97 round-trip as well. Keep in mind that Frontier charges extra for any bags larger than a small personal item (small backpack, large purse, etc.). Pack super light to get the lowest price. Checked bag fees start at $25 each way. Larger carry-on bag fees start at $30 each way.