Originally Posted by
jk88usa
F9 seems to claim "sorry...not reporting it" for flights that change by mere minutes.
That would be a violation of the Federal regulation that requires carriers to report on-time performance and display it to customers. Flight schedule changes by less than 30 minutes and the 'old' performance is reported. Changing the flight number doesn't do anything, either - an FT myth beloved by cynics.
Originally Posted by
jk88usa
Southwest estimates past on-time percentage based on flights that could be hours different from the new schedule.
I doubt that. The reporting requirements are very specific.