I think your refering to flights operated by Mesa. Mesaba operates turbo props for US. The CRJ is one of the most uncomfortable rides around. There are planes that have been updated but not all we refer to the CRJ as the bumbuster. I hope your flights arent long. The flights arrive in Charlotte in the E concourse and I dont think any go in to Philly. I dont know where they arrive at in PHX. Alcohol can only be purchased with cash on US Airways express. A caveat that many times its not loaded onto the planes and the F/A's are not required to sell or comp the alcohol to you if you do not bring exact change or they do not have change.