Frontier is back with more $39 round-trip fares and has over 100 routes priced between $39-$97 round-trip for travel through mid-May.
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 May 9. Many routes start service the second week of April and 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 March 21.
A sample of nonstop fares include:
Denver to Las Vegas $39 round-trip
Cincinnati to Atlanta $39 round-trip
Atlanta to Orlando $39 round-trip
Cleveland to Raleigh $39 round-trip
Grand Rapids to Philadelphia $39 round-trip
Houston to Raleigh $39 round-trip
Denver to Salt Lake City $39 round-trip
Detroit to Long Island-Islip $39 round-trip
Chicago to Long Island-Islip $39 round-trip
Birmingham to Philadelphia $39 round-trip
Chicago to Colorado Springs $39 round-trip
Philadelphia to Houston $57 round-trip
Atlanta to Long Island-Islip $57 round-trip
Buffalo to Raleigh $57 round-trip
Providence to Tampa $57 round-trip
Minneapolis to Trenton $57 round-trip
Charlotte to Philadelphia $66 round-trip
Atlanta to Las Vegas $67 round-trip
Madison to Philadelphia $67 round-trip
Long Island-Islip to San Juan $68 round-trip
New York to Cincinnati $77 round-trip
Oklahoma City to San Diego $77 round-trip
Kansas City to Raleigh $83 round-trip
Atlanta to Colorado Springs $87 round-trip
Denver to Palm Springs $97 round-trip
Trenton to Jacksonville $97 round-trip
These fares all work in reverse and there are many more routes priced between $39-$97 or in the $100-$197 round-trip range as well. 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.
Frontier also has a promo code for travel to Florida or Las Vegas. Using the promo code SAVE75 on FlyFrontier.com will discount travel to Florida or Las Vegas on Sundays, Mondays, Tuesdays, and Wednesdays, from April 3 through May 9. Promo code expires at 11:59 pm ET, on March 21.
Flights from Florida or Las Vegas will not be discounted so you'll only see a price drop in one direction if you're traveling round-trip. Also, the discount does not apply to taxes nor Frontier's online booking fee, which they label a "Carrier Interface Charge". This means some routes still won't have a very big price drop. As always, Frontier has a long list of specific routes that are excluded from the promo code sale.