To add a bit. They will assign you 26-27 hours of IOE in the base you designate. (Usually). About 5 days of flying. Whichever month you finish IOE in you will be assigned trips in that same base to finish out the month. They have routinely put out a vacancy domocile bid once a month. So as stated above, somewhere in the latter part of training you will be eligible to bid for your true seniority base. Oakland has been the most junior historically but the vacancies have been varied recently. Houston has been pretty junior. 3-4 of my class got HOU right out of training. One got MDW. One new hire got HOU on this last bid IIRC.