Originally Posted by
gnaget
No, they are pulled from Z. You cannot view Z anywhere, including Expertflyer. You have to call Copa. Z is used for all classes of upgrades including the instant upgrades for Y,B,M. I don't think they open up anything before the flight, including at the "windows" for elites. So if Z=0 at booking then you wait until day of flight.
You have to call to get the Z information. But if you see I then you will definitely get the upgrade.
"Z" is the fare code in the UA system for upgrades on UA code shares on COPA metal. If you are booking with COPA, the same seat is an "I" fare. You can see availability for free at this site:
http://www.flightstats.com/go/Flight...vailability.do
If you pick a flight that has both a COPA number and a UA number, you should see that UA "Z" is equal to COPA "I" quantity. I don't know that Z is always equal to I, but I have never seen different.