The latest promo code sale from Frontier allows you to take 50% off the base fare for spring travel. Promo code expires tonight, March 19.

Use promo code GOGREEN when booking on to take 50% off the base fare for nonstop domestic flights. Travel is any day of the week, except Sundays, from April 9 through May 9.

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. However, since this promo code sale includes Friday travel, you may find a decent discount for Friday travel, which is often excluded from these promo code sales.

There is a long list of specific routes excluded from the promo code sale. Frontier operates about half of their markets on a limited and/or seasonal basis, so be sure to check out the fare details by clicking on the "See more details" link for the "Flexible Dates" fare on the following page. This page will inform you which months and days of the week Frontier travels any given route.

Tickets must be booked by 11:59 p.m. tonight, March 19.

A sample of nonstop fares include:

Salt Lake City to Las Vegas $53 round-trip

San Jose, CA to Las Vegas $53 round-trip

Cincinnati to Dallas $58 round-trip

New York to Cincinnati $77 round-trip

St. Louis to Orlando $82 round-trip

Chicago to Las Vegas $84 round-trip

Atlanta to Denver $92 round-trip

Raleigh to Las Vegas $107 round-trip

Columbus to Denver $112 round-trip

Denver to Orlando $117 round-trip

Atlanta to Los Angeles $121 round-trip

Cincinnati to Los Angeles $126 round-trip

Philadelphia to San Juan $136 round-trip

These fares all work in reverse and there are many more routes available 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. 

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