Originally Posted by tods27

So, why not just increase the number of flight numbers? Maybe Shares can only handle 1500 flight numbers . Is there some sort of FAA registration they need for additional flight numbers?

They should start rationalizing the flight numbers to follow planes on their routes (eg DEN-MCI-ORD should have one flight number as a direct flight) instead of having "direct" flights for marketing purposes. I'm sure they have a lot of Hub-to-spoke-to-other-hub routes that could be consolidated.