LAS MD80 FO seems very junior, assuming you get the MD80 in training, probably get it right away. I'm not sure how many more MD80 classes there will be this year, I'm told the focus is on airbus.

PIE seems to vary a bit but overall I would say if you didn't get it in class you would get it within 6 months, possibly before training was completed. PIE flies both MD80 and AB.

IWA seems more senior. 6 months? Maybe someone else will chime in on this, I was looking at the seniority list to attempt to formulate these opinions.

Allegiant does these kinds of things differently than most airlines. It seems what is presented to the new hire class to bid on is not generally made available for the entire company to bid on, at least that was the case when I was hired. Again, someone else can probably chime in to what the current practice is.