If I quit a regional and decide to come back a few years later, I know I will lose all seniority and start over. Will I start back at year one pay or pick up where I left off? I'm sure it depends on the company but curious if anyone has done this and what the outcome was...

If you lose all seniority and start over, why would you start at the pay when you left?! Think about what you say before you post.

There is a difference between seniority and longevity. I know it's not really a comparison but more of an example. If I leave the Military at 10 years and come back a few years later, my pay is still at the 10 year mark when I return.

Of course there is a difference. If you start over (hint, hint) longevity means squat. Airlines don't work like the military. Now, if you take a leave of absence, without quitting, then you still maintain seniority and your pay reflects that. I know of 1 regional that gives you 60 days? to return, after resigning, with previous seniority.