Looking WAY back ...... a PHX hub was on Bill Howard and Piedmont Airlines wish list in the 80's. PHX is solid ....
Even Allegheny's first destination west of the Mississippi post-deregulation was....not Los Angeles, not San Francisco, not Seattle/Tacoma, not Denver....but (GASP), PHOENIX!
Look at the route map on the link provided....WOW! What a huge airline back then with global reach! Defintely world class and not regional like America West!
Allegheny Airlines 1979