Originally Posted by
kb1992
If you use any kind of e-cert, dollar off, or 20% off, the ticket won't show upgrade link.
Tickets were purchased after 3/3.
There are other cases people reported as well.
PM'ed UA Insider but received no response.
I guess that explains it. I used an e-cert and made my reservation on 3/5. Well I still have about a month before my flight so, I'll try again next week to see if anything has been fixed.