This is probably one of the most useful flight trackers I have seen yet. They provide live information about the flight, and if there are any delays. So if you know the flight you are supposed to be traveling on in the morning you can tell if its going to be late or early on arrival, so you know if your departure is going to be late. The input for the search is very intuitive, you can search with multiple feeds. Currently live maps only work for domestic and international flights which are over the Continental US and Canada, for other countries they will give you detailed information about the flight and the status of the flight which is great. You can also review flight times of any of the airlines so then you may

Search Fields:

• It auto completes for airports and airlines, and they have the full list of both
• You can enter by destination and then choose from a list of times if the route has multiple flights
• You can search directly by flight number
• You can also try a random flight just to see the tracking system, but there have to be active flights in US at the time.

Link: FlightStats
Link: FlightStats – Tracker