Here are some websites that can help you predict if your flight will be delayed this holiday season. Also, for a better travel experience make sure to have the customer service number of your airline and to arrive very (very) early.
USA Today
http://www.usatoday.com/travel/flights/delays/tracker-index.htm
FlightArrivals.Com
http://www.flightarrivals.com/cgi-bin/WebObjects/Flights
Weather Channel
http://www.weather.com/activities/travel/businesstraveler/?from=secondarynav
FAA
http://www.fly.faa.gov/flyfaa/usmap.jsp
NATCA
http://www.avoiddelays.com/
FlightAware.Com
http://flightaware.com/
FlightView.com
http://www.flightview.com/TravelTools/default.asp