And in my opinion, I'd say IAD is a bigger hub than LAX, considering all the caribbean and european flights it serves. My order would be as follows:
ORD,DEN,SFO,IAD,LAX
After that, i'd be hesitant to call anything a "hub."
Originally Posted by
ua_to_ord
LAS is a hub of sorts, considering the LAS-FAT UX flight...

and don't forget LAS-PSP!