Spirit Airlines, the only airline to charge for carry-on bags,is raising its baggage rates.
If you book your luggage less than 24 hours before flight time, there will be an additional $5 charge above the currrent fees, and $10 if booking over the phone. (So, if you try to bring your carry-on aboard, and it doesn’t fit under the seat, you’ll pay $45 at the gate for the privilege of using an overhead locker.)
Checked bag limits have been lowered from 50 to 40 lbs. The extra fee for any bag between 40 and 50 pounds is $25.