I am going from Dec. 23 to Dec. 27. The cheapest I have found is 2.
Chosen Answer:
Airfare Predictor:
http://www.farecast.com/
Airfare Alerter:
http://www.airfarewatchdog.com/
Booking Engines:
http://www.travelocity.com/
http://www.orbitz.com/
http://www.expedia.com/
http://www.hotwire.com/
http://www.priceline.com/
http://www.cheaptickets.com/
http://www.cheapflights.com/
http://www.faremax.com/
http://www.traveldiscounters.com/
http://www.lowestfare.com/
http://www.skyauction.com/
http://www.onetravel.com/
http://www.flights.com/
http://www.airlineticketsdirect.com/
http://www.cheapoair.com/
http://www.bookingbuddy.com/
http://www.travelzoo.com/
http://www.kayak.com/
http://www.travelation.com/
http://www.airfare.com/
http://www.airgorilla.com/
http://www.lastminutetravel.com/
http://www.ticketspinner.com/
http://www.lowfares.com/
http://www.travelgrove.com/
http://www.farefox.com/
http://www.economytravel.com/
http://www.bargaintravel.com/
http://www.travelcuts.com/
For Students & Faculty:
http://www.statravel.com/
http://www.studentuniverse.com/
List of Airline Websites:
http://www.geocities.com/Thavery2000/