I am booked on a B class fare NRT to IAD this weekend. Anyone know what my chances are for an upgrade if I choose that option? Right now, there are 3 seats showing open in Business but when trying to upgrade, it says waitlist only for the segment of the trip. I think 30k miles is well worth it for such a long flight considering it was booked last minute and the only available seat is a middle unless I pay for E+ which is almost $200. I'm trying to get the flight changed to Sunday which shows a lot more Business seats open, but if that doesn't pan out tomorrow, I'm stuck with this one.