Isn't it always the case that whenever you make it to the airport 2 hours before a flight, the flight is often delayed? Or you offer to pick someone up from the airport only to learn that his or her flight has been canceled? From my experience with flight info websites, I'd have to say that this one is by far the best—definitely saving you lots of airport headaches!
To get started, all you have to do is open a free account and enter your flight number(s). FlightStat will then work its magic, providing you with tons of info about delays, security times and more.