Hubs have limited gates and throughput so do you add a 50 Seater from a tiny town or another frequency from a much larger city from which you are taking passengers from ULCCs, LCCs and P2Ps using basic economy, no change fees and more amenities?

TD Cowen: Advantage DAL & UAL

Both airlines have been shrinking their regional outsourcing and growing the size and number of mainline aircraft.