Allegiant has a few one way fares in Dec for $48 and in Jan for $32. They commence flights on Dec 15th out of Niagara Falls. We flew with them during March break this year. Just take carry on luggage so you don't pay extra fees.NIAGARA FALLS/BUFFALO,NY (IAG) to ST PETE/CLEARWATER ,FL (PIE)
Departing: Thu, Dec 15 8:50 pm FLT# 895
Returning: Sun, Dec 25 6:40 am FLT# 894
Trip Price = $95.98
Taxes & Fees = $38.40
Total Cost $134.38
http://www.allegiantair.com/
