Originally Posted by juncho
Actually, I'm asking about the exact opposite. I'd like my US Airways flight credited into my United Airlines Premier account.
Has anyone done this before? If so, how can I input my United number into the US Airways flight?
Yes. All the time with no problems. Just put your UA # in the reservation at time of booking.
The only thing is that you can't request free e-upgrades on the US segments with a UA # in the locator if you are also an Elite on US trying to upgrade. If using your UA #, you have to purchase the e-upgrades on the day of departure if you want the miles credited to UA even if you're a US elite.