Yahoo, Google and Ask Jeeves provide details about where a flight is headed and when it will touch ground. To utilize these services, all you need to do is enter an airline and flight number into a search box.

The majority of this information applies to flights in the U.S. and Canadian air traffic systems. Sometimes, you can find information about European or Asian flight coming to the U.S. or Canada. Exceptions do exist and not all service offer access to all airlines.

Some watch a airline flight tracker services, apart from the major airline sites, provide almost real-time tracking updates with information straight from FAA computers and other sources.

Watch a airline flight tracker Services:

Founded in March of 2005, FlightAware was the first company to offer free flight tracking services for both private and commercial air traffic in the United States. FlightAware offers live flight data, airport information, weather maps and charts, as well as aviation news to nearly two million users a month.

FlightAware also powers operational management and dispatch software, airport FIDS (flight information displays), and provides reporting data to aircraft and airport operators.

Flightview.com
4info.net
flightaware.com