Standby by question! Heading up to Newark tomorrow in the morning and then coming back on the last flight out back to DCA. Right now, I'm booked on the earliest flight to Newark and the last flight back to DC. If my appointment end early and I get to the airport, I was thinking of doing the stand by flight that leaves at 545 PM instead of my flight at 830 PM. My ticket is United First (P). If I do stand by, is it looking for a first class seat, economy seat, or either? If I read it right, it seemed that Upgrade list is first before stand by, so I'm assuming the change of getting a First Class seat is close to zero (which is fine, wasn't sure how this worked, hence the question.)