Originally Posted by
mduell
UA is doing a lot of continuing flights, some on logical routes and others not, to ration flight numbers. Mainline only has about 1500 flight numbers for 4k flights.
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.