<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by Swiss Tony:
On the same point, what fare bucket do the upgrades to J come out of, and is there any way to check availability?</font>
See
Thread listing all known UA revenue and award booking codes and a summary of each one
Upgrades to business class come from
I inventory.
You can check availability by calling UA or by searching for an award (free) seat at the United website. When searching for a saver award, all of the award codes will display. But it will only show flights for which there are saver awards -- and it's possible a flight without saver awards will have upgrade inventory, so this method is far from complete.
Unfortunately, I inventory doesn't show up online anywhere else that I'm aware of.
(But would love to be corrected!
)
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View from the Wing: A blog about Free Miles and Free Markets