Originally Posted by
sethb
DL doesn't fill F with window upgrades; they have a good idea how many last-minute F and Y purchases are likely to happen.
Sometimes. And sometimes they're pretty terrible at it. My last flight with DL was on a mad dog. Plane went out with 35 out of 144 seats in coach occupied. DL still felt the need to keep 13 F seats (out of 16) open right up to the gate. I nearly turned down the UG so I could take a full row of 3 seats in the back.