How to tell 6 hours in advance if a plane will be late

FlightCaster can predict 6 hours in advance whether a flight will be delayed. According to the webiste, FlightCaster takes data from multiple sources and "...crunches them in a database with a patent-pending algorithm and process. We use 10 years of flight data along with current and near-term forecasted conditions to establish likely delay factors and assess the impact they will have on your flight."

The FlightCaster website also has some interesting information in the faq section on what causes delays, why you have to wait on the tarmac, the most and least delayed airlines and airports, plus more.

Thanks Makeuseof.com.