Maybe this has been discussed already, but in the past I'd fly often on the PHX-YYC or PHX-YVR routes and been told that as a CP (*G), no lounge access. That was one of the things that made UA more palatable ... RCC access (for whatever that was worth).

But today I noticed on US Airways' site ...:

"Enjoy special privileges when you travel on any participating Star Alliance airline. Just present your Chairman's Preferred membership card and same-day international ticket to access to the US Airways Club and to more than 600 Star Alliance lounges.

•Eligible international destinations for lounge access include Asia, Africa, Canada, Europe, Middle East, South America and the following cities: Mexico City, Guadalajara, San Jose (Costa Rica) "

Nice! ^

Like I said, probably already discussed somewhere, but thought I'd put it out here anyway... :-: