Answer
Airfare predictor:
http://www.farecast.com/
airfare alerters:
http://www.airfarewatchdog.com/
http://www.farecompare.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/
