Originally Posted by
okrogius
There are more round about routings that are upgrade eligible, e.g. SEA-SFO/LAX-HNL-GUM-HKG, where only HNL-GUM isn't upgrade friendly. Of course, whether or not that's an improvement is debatable.
How does one get to HKG from the States using a GPU if they didn't purchase a W or higher fare? Not "unfriendly," it's impossible, isn't it? (Or is GUM a special case when it comes to upgrades?)