Information is valid at time of publication. So sometimes you may not find the price mentioned in the post (ex. after several days of the original posting date). It means that the deal was sold out or supplier (airline/agency) has changed the conditions or removed the offer.
One of the main low-cost US carriers has just released their Thanksgiving promotion.
Fares from $23.10* One-Way (Members)
Fares from $34.10* One-Way (Non-members)
Travel select dates in December 2015, January 2016 and February 2016
Book by 11:59PM on November 26, 2015
You can check your destination HERE.
You may also be interested: A guide to Spirit Airlines fees during booking.