I've got a trip coming up from Denver to Vienna. The first leg is on UA and the second is on OS. I bought the ticket on the United web site and the second leg is booked with a UA flight number. Will I be able to check-in on line on the United web site?
The reason I'm asking is that the UA web site can't show me the seat map for the IAD-VIE leg, which leads me to wonder if it will be able to handle check-in.
Thanks in advance.