Originally Posted by
rucksack
PHX gets a lot of O/D traffic since it gets a lot of tourism, but I thought American was the only airline that operates PHX as a hub?
CHI = ORD (and MDW)
at mdw you don’t have much of a choice. Southwest dominates there. Fortunately delta still flies out of mdw but they are the only major airline that does and they still not fly to a couple hubs.