JS said:That will happen in any hub that has more than one destination.
Really? So if Southwest ended its DAL-SAT flights, it would also get rid of its DAL-AUS flights because they could no longer count on SAT-DAL-AUS passengers? I doubt it.
You're missing the point. Probably half of the destinations served by AA from BNA (just like US Express from PIT) saw so few passengers beginning or ending their trips at BNA that the loss was negligible to the folks in Nashville. And when I say "so few," I mean fewer than ten per day.
How many people fly from HOU to CRP, compared to DAL? How many people fly from DAL to MAF, compared to MSY? Southwest isn't going to cancel CRP and MAF just because they supply fewer passengers. If you cancel destinations just because they aren't the most popular, you will end up with just one route.
Again, you're missing the point. HOU-CRP (300+ passengers/day) and DAL-MAF (500 passengers/day) have enough demand to justify service on their own merits. Offering connections at HOU, DAL, or MAF improves the economics in order to be able to offer more daily flights on 737's. Few, if any, people would fly BNA-SDF/PAH/TYS/CHA since it's faster to just drive.