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

Boise to Denver $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 Tulsa $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.

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