Currently for newhires:

FLL out of training or 1 month
MCO within a few months

Any base in the system will be easily attainable with all of the hiring and upgrading going on this year and next. Upgrade times are only accurate for those upgrading today or in the near future. MCO is still expanding and is somewhat of a wildcard in terms of seniority, but the trend thus far is a lot of mid to high seniority captains bidding over.