The mail flights only operate out of Hyannis. I think most of the mail pilots live near here but it's obviously not required as long as you can get here. That first flight is pretty early, though. The mail line isn't bid on, it's an in-between step for time building.
We have FOs based in the major cities in each region we operate in but I don't know how the bidding works. Maybe one of the pilots can shed aome light.