Options to select a base are on the first day of class. Seniority is based upon your age. If you take a look at the Eagle life thread the numbers from multiple classes in the past have been posted there. Statistically DFW has had the highest number of new hires in the last few classes so your chances of getting it are pretty good. Nothing is for certain in this business and there is the extreme remote chance that the entire class will be MIA ATR.

I'll be in class August first and crossing my fingers for DFW EMB.

Hope this helps.