Originally Posted by
jsloan
As noted, if you view the seat map from within your reservation, you will see an X in all seats that are not in your cabin. UA assumes you only care about seats in the cabin you're booked in. If you view the seat map from the purchase flow, as if you were buying a new ticket, you see the complete seat map. The front is nearly full, and the back is nearly empty.
although…semantics here…even in Y, there are usually seats blocked from assignment prior to checkin. Most (all?) narrowbody have 7DE blocked, and can not be selected until checkin. Also, if you have a reservation that includes a minor, exit rows will show as not available, even though they are available on the generic seatmap - obviously since minors can not sit in an exit row.