It all depends on what aircraft you get hired to. Each training class has slots for different bases, for example June 7 is 5 NFC 1 OFE 3 MFA and 3 SFA, so your date of birth determines where you get to bid to, oldest is most senior. If you are too junior to get a jet slot, it will be at least a year of seat lock to the atr, then and only then if there is an opening a year from now you could bid for a vacancy to one of the other bases. If you get ATR the options are dfw mia and sju, if you get the erj or the crj you could bid on an open slot for ORD if one is available as soon as it is open even if you were originally awarded NFC and a OFC slot opens. I hope that makes sense.