Frontier is back with another big promo code sale for winter/spring travel. Take 75% off nonstop domestic flights on specific dates. If you've held off on booking your spring break trip, this sale could help you find a relative deal.

Use promo code SAVE75 when booking on FlyFrontier.com to take 75% off the base fare for nonstop domestic flights on these specific dates.

• March: 1 - 2, 4 - 7, 12 - 13, 26 - 27, 2019.
• April: 2-4, 9-10, 2019.

The discount does not apply to taxes nor Frontier's online booking fee, which is labeled a "Carrier Interface Charge". This means some routes still won't have a very big price drop even with the big sticker shock of 75% off. However, there are plenty of routes where we are seeing some big price drops, especially for some dates in March that are currently priced pretty high.

If you are unfamiliar with Frontier Airlines, please read our guide on Everything You Need to Know Before You Fly Frontier.

There are specific routes excluded from this promo code sale and you also may have to click around to find available dates since Frontier operates about half of its route network on just a few days each week.

Tickets must be booked by 11:59 pm ET, February 22, 2019.

A sample of nonstop fares include:

Charlotte to Tampa $36 roundtrip

Atlanta to Orlando $38 roundtrip

Sacramento to Las Vegas $42 roundtrip

Austin to Denver $64 roundtrip

Washington D.C. to Orlando $70 roundtrip

Orlando to Raleigh $70 roundtrip

Denver to Salt Lake City $70 roundtrip

Philadelphia to West Palm Beach $75 roundtrip

San Antonio to Las Vegas $75 roundtrip

Washington D.C. to Austin $75 roundtrip

Pittsburgh to Denver $75 roundtrip

Austin to Orange County $77 roundtrip

Philadelphia to Denver $80 roundtrip

Denver to Atlanta $80 roundtrip

Buffalo to Orlando $85 roundtrip

Atlanta to Las Vegas $90 roundtrip

Atlanta to Los Angeles $95 roundtrip

Milwaukee to Las Vegas $95 roundtrip

Hartford to Denver $105 roundtrip

Raleigh to San Diego $112 roundtrip

These fares all work in reverse and there are many more routes available as well. Lowest fares may not be available throughout the entire travel period. 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, large purse, etc.). Pack super light to get the lowest price. Checked bag fees start at $30 each way. Larger carry-on bag fees start at $35 each way.

If you want to avoid all extra fees, read How to Pack in Just a Personal Item Sized Bag.

Featured image by Colin A. Pierce via Shutterstock.