PHX flights are NEVER on time. I'm generally on the 7am (719) or 10am (751) to PDX (the 4pm is always more expensive or not avaliable with miles) and the 8pm from PDX-PHX (710) and none of them EVER seem to be on time.
Being new to this whole mileage run idea I'm sure I'll fly all over this next year but I'm an ASU student from Vancouver, WA so I fly Alaska exclusively between here and home about 4-5 times a year.