I have a reservation using a free ticket voucher -- I need to change the destination for the return portion. The original flight and the flight I now want leave within an hour of each other.

I plan on purchasing a new ticket for the flight and that has to be purchased via the corporate TA to get their discount, etc. So even if I wanted to use that existing reservation (and I don't), I'd have a problem.

I'm just wondering since the times are so close, if I'll have any problems with UA at check-in? I may not have printer access and will likely have to check in at the airport.

Thanks.