Flyf15 is correct. Seniority is involved in almost every airline job. Seniority determines what shift you work, the days off you have, what job you work, when you take your vacation, your pay, whether you work full time or part time, and even what city you work in.
I heard that currently it takes about 20 years of seniority to have a full time ticket counter/gate agent job for American in DFW
. This is due to the downsizing.
Boeing Flown: 701,702,703;717;720;721,722;731,732,733,734,735,737,738,739;741,742,743,744,747SP;752,753;762,763;772,773.