Originally Posted by
davidcito
Had flight US destination to VIE, booked via UA ticket number, operated by OS. Uptrip now suggests that was not a valid ticket for the app. Is that true? Thought it would be operating carrier (OS) that would count?
Did you try adding it via the booking code (the OS one)? For boarding passes of UA (for OS flights) and the UA booking code it did not work for me in the past, always had to add it through the booking code of OS (found it when adding the booking to the OS/LH app/website. Otherwise open a ticket for it.