Sunrise over the world from a plane window. Oli Kellett—Getty Images

Spirit Offers 99% Off on Flights for One Day Only

Nov 24, 2015

The budget airline Spirit is offering a one-day-only mega discount—to the tune of 99%—on certain routes for travel coming up in the next few months.

If you’re traveling between December 1 and December 17, and between January 6, 2016 and February 9, 2016, you might find an extremely discounted ticket if you act fast—the sale ends at midnight today, November 24.

And if you do book travel you’ll also have to navigate the deal’s arcane fine print—coupon not valid on Friday or Saturdays, for instance, or for travel to Cancun, Atl City, or for travel from Dallas to Los Angeles, or from Detroit to Orlando, plus a whole bunch of other exceptions. Spirit only tells you where you can’t go, not where you can, so booking traveling the steep discount ain’t easy.

Check out the sale here.

Maybe Spirit is slashing prices to fill seats after a particularly tough year for the budget airline. FiveThirtyEight announced Tuesday that Spirit was the single slowest major airline in America, losing an average of nine minutes for passengers gate to gate.

MONEY may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.

Quotes delayed at least 15 minutes. Market data provided by Interactive Data. ETF and Mutual Fund data provided by Morningstar, Inc. Dow Jones Terms & Conditions: http://www.djindexes.com/mdsidx/html/tandc/indexestandcs.html. S&P Index data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved. Terms & Conditions. Powered and implemented by Interactive Data Managed Solutions