Frontier claims to have over one million seats on sale with fares starting at just $20 one-way. In this sale, I've found around 60 routes to be priced with base fares of $1 each way adding up to $39 roundtrip after taxes and booking fees.
If you are unfamiliar with Frontier Airlines, please read our guide on Everything You Need to Know Before You Fly Frontier.
Availability is limited so you must be somewhat flexible to find the lowest price. Travel days will vary by route, but generally, fares are available through early October, mid-November, or mid-February. Pretty much all of these routes are only flown a few times each week so be sure to check out the specifics in the fare details on your route.
Update: Sale has been extended! Tickets must now be booked by 11:59 pm ET, September 5.
Nonstop fares include:
Greenville to Orlando $34 roundtrip
Charlotte to Philadelphia $37 roundtrip
Trenton to Charlotte $37 roundtrip
Atlanta to Miami $39 roundtrip
Cincinnati to Orlando $39 roundtrip
Salt Lake City to Las Vegas $39 roundtrip
Atlanta to Cincinnati $39 roundtrip
Atlanta to Orlando $39 roundtrip
Indianapolis to Philadelphia $39 roundtrip
Sacramento to Las Vegas $39 roundtrip
Nashville to Fort Myers $39 roundtrip
Charleston to Philadelphia $39 roundtrip
Providence to Raleigh $39 roundtrip
Charlotte to San Antonio $39 roundtrip
Columbus to San Antonio $39 roundtrip
Long Island-Islip to Chicago $39 roundtrip
Jacksonville to Austin $39 roundtrip
Orlando to Birmingham $39 roundtrip
Wichita to Denver $39 roundtrip
Denver to Tucson $39 roundtrip
San Antonio to New Orleans $39 roundtrip
Oklahoma City to San Antonio $39 roundtrip
Omaha to San Antonio $39 roundtrip
San Antonio to Tulsa $39 roundtrip
Albuquerque to San Antonio $39 roundtrip
These fares all work in reverse as well. You'll have to decline all extras to get the lowest price.
Keep in mind that Frontier charges extra for any bags larger than a small personal item (small backpack, 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.
Header image by Colin A Pierce via Shutterstock.