Numbers above are correct but misleading. When building schedules the union, which has significant control over line building, thinks the goal is to make turn lines (two legs out and back in the same day). That is why the union summary specifically includes them. All the high credit per day lines with over 17 off get packed into those turn lines, and are picked by very senior pilots. After turns, they try to make "pure" lines for some reason. These have you do the same type of trips all month, like Hawaii, SE AK, up and down the west coast, 4 days, or redeye 2-days with less than 14 hr rest during a day layover, etc. Whatever pure categories they have come up with. The rest of the trips get assembled into random lines where you make average daily guarantee, and nobody is willing to or has enough days off to trade with you.