It feels like everytime I write about Frontier Airlines they are offering some sort of discount and this time is no exception, as they are offering 12% off most of their flights. There are of course restrictions around dates of travel but otherwise this is valid for both one-ways and roundtrips and all routes serviced by Frontier. You will want to use promo code LOWFARES when you book flights online at frontier.com.

Here are the key details to know:

• Flights must be booked by 11:59 EST on October 30th
• Valid travel dates are from November 6th to February 11th, a little over 3 months.
• Not valid for Friday or Sunday travel
• There are unfortunately blackout dates around the holidays. They are as follows: Nov. 21-26; Nov. 29- Dec. 1; Dec 19-24; Dec. 26-28 2014; Jan. 3-4, 2015. Interestingly, MLK weekend is not restricted so you could return on the Monday of that weekend using this promotion.

It is important to note that now Frontier charges for carry-on bags and seat reservations, similar to Spirit. I don’t consider them on the same level (I think Spirit is much worse at nickel & diming you) but Andrea flew them last month from PDX-DEN-LGA and it was a perfectly fine experience. She was able to use a prior discount code from Frontier (these happen with enough regularity) and the flights, even including the carry-on baggage fee, were $75 to $100 cheaper then United or other carriers. And with Frontier aggressively expanding on the east coast with more flights out of NY and Washington DC, it’s worth taking a look to see if this promo could help even if you are not based in Denver or the West Coast.