Originally Posted by aztimm

Generally from what I've seen (I used to work in downtown Tempe and now work between downtown Tempe and PHX) and experienced on flights, the change happens between noon and 1pm most days. Landings seem to happen from the West (over downtown Phoenix) in the mornings, takeoffs over downtown Tempe. The change takes about 15 min (I was out walking at the lake and saw flights taking off, stop, then saw landings) before things are switched. I try to fly East in the morning if I can, it saves time from doing a loop in the air, and land from the East in the afternoon/evening.