Spirit Airlines is offering a Black Friday special where you can receive 90% off all flights TODAY ONLY. While this is great IF YOU ACTUALLY WANT TO FLY SPIRIT, keep in mind that the discount is only on the base fare and not those extra taxes and fees (which can sometimes make up most of the flight cost!). It is also only available on travel for a Tuesday or Wednesday between December 5, 2017 and February 13, 2018 (blackout dates: December 19 through January 3, 2018).
Make sure to use coupon code 90PCT (all caps, no spaces) in the Promotion Code box on the home page. While this can be a great offer for those with extremely flexible travel, Spirit does charge extra for every little thing – carry on bags, seat selection, etc.