You can track any flight here FlightAware - Flight Tracker / Flight Status / Flight Tracking
Welcome to 2005 technology.
Cooler yet with an app like FlightRadar 24 (Flightradar24.com - Live flight tracker!) you can use the camera on your phone to look at an aircraft flying overhead and it will tell you the flight information for it. Origination, Destination, Airplane model, altitude, speed, etc.
Very cool.