Originally Posted by bse118

Because if the O/D flight is only 2x a week (like Norweigian from my home airport and many others) or 1x a day (like many NK and G4 routes); there's no backup or alternate options when things go pear-shaped. If my hub connection through DFW is messed up - decent change AA can re-route me through another hub. No such luck on many LCCs.

Don't get me wrong: these carriers have their purpose - but reliable business travel is not one of them