Another " this makes no sense" United policy. I booked two r/t flights from NYC to HNL. One flight LGA via IAH to HNL. The other flight on a nonstop EWR to HNL. As per UNITED Mileage Plus website, upgrades on EWR-HNL, IAH-HNL and IAD-HNL are only available with EITHER regional or global upgrade certificates. I have 4 global upgrade certificates expiring Oct. 31, and I wanted to use those for my 2 trips. For the past 3 days I am dealing with several 1K reservation agents, UNITED supervisors. All of them telling me that I can use "Regional Upgrade Certificates" BUT CAN NOT use "Global Upgrade Certificates" for Hawaii. The response is always the same. The new system will not allow them to use Global Upgrade Certificates on Hawaiian flights. Every time you hear another story. One agent was trying to convince me that I needed al least a W fare to Hawaii in order to upgrade. That might be true for INTERNATIONAL flights, but clearly not for domestic or Hawaiian flights. I keep referring to the online UNITED Mileage Plus upgrade summery. It clearly states that I can use EITHER regional or global certificates. UNITED obviously has still issues and not all staff is up to date. That does not make any sense that a regional upgrade certificate is worth more, than a global upgrade certificate. Any advise ? What should I do ? It is so very frustrating.