4 hours out, airlines notify users of ~4% of flights that will eventually be delayed 1+ hours. FlightCaster right now captures 40% of those flights 4 hours out

4 hours out, airlines notify users of ~4% of flights that will eventually be delayed 1+ hours. FlightCaster right now captures 40% of those flights 4 hours out (and growing as the algorithm is improved). That is the origination of the statistic.