Originally Posted by Longhornmaniac8

Current junior bases are PIT and CMH, with EWR and LGA following it up.

Generally, any base is within reach by the end of training (OE) except for MIA and IAH. Those you can expect to take another 4-6 months to hold after finishing training.

ORD is fairly junior on the FO side (forget about it on the CA side...2007 hires are still on reserve), but vacancies are few and far between, so that one is another that is tough to hold.