I got an email today that Frontier is offering a sale with one-way routes as low as $20 one-way. These types of sales happen fairly regularly across different airlines.
It looks like there are several city pairs available for $20
- Albuquerque (ABQ): Denver
- Austin (AUS): New Orleans
- Colorado Springs (COS): Las Vegas
- Kansas City (MCI): Denver
- Denver (DEN): Albuquerque, Kansas City, Las Vegas, Oklahoma City, Omaha, Salt Lake City
- Las Vegas (LAS): Colorado Springs, Denver, Salt Lake City, San Francisco, San Jose
- New Orleans (MSY): Austin, Orlando, San Antonio
- Oklahoma City (OKC): Denver
- Omaha (OMA): Denver
- Orlando (MCO): New Orleans, Raleigh / Durham
- Raleigh / Durham (RDU): Orlando
- Salt Lake City (SLC): Denver, Las Vegas
- San Antonio (SAT): New Orleans
- San Francisco (SFO): Las Vegas
- San Jose (SJC): Las Vegas
In addition – there are a variety of other city pairs with cheap flights. Here is a sampling from my hometown of Cincinnati (CVG)
Different routes have different rules, restrictions and available dates, so check your route for the fine print. As a reminder, Frontier is a low-cost airline, so be prepared to pay for food, bags, seats etc. If you’re traveling Frontier with a family, check out these 6 tips for flying Frontier with a family but watch out for the huge problem flying Frontier. And if you get a schedule change, check to see if you might get a $50 or $100 voucher for a Frontier schedule change!
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Dan Miller travels with his wife and 6 (SIX!) children. He loves to help families travel for free / cheap, especially larger families. If you are looking for help, drop him an email at 
I’m ready to kick Frontier to the curb and not renew my Discount Den membership. Eastward ‘cheap’ flights out of St. Louis seems only to go to FL or ATL. I recently came back from DEN on Frontier and spent too much time checking my bag. There were probably over 100 people in line, only two workers most of the time and one computer was screwing up.
Frontiers business model is geared to the once a year family vacation trip. Many cities don’t offer daily service which means you go when they want to go. On flights longer than 2 hours, be prepared to sit on a seat like a park bench. UNCOMFORTABLE! And, should a mechanical or crew issue arise, your flight could easily be canceled by several days. They just don’t have any replacement aircraft. I burned my 200,000 Elite tier miles years ago and now only go on Southwest which has served me wonderfully.