Originally Posted by
sbm12
Who did you call? If you called CO they should have simply taken your cash+miles and either upgraded you or put you on the waitlist and it would have cleared.
Once inside 24 hours you cannot request the upgrade for a BF flight even if R inventory opens up.
With regards to miles for upgrades does the carrier you purchase from or the operating carrier matter? From the above I take it that even though he purchased from UA because its operated by CO he can use miles to upgrade on any fare class, not just B and above?
Edit: A few things I didn't see mentioned are whether he's trying to use UA miles or CO miles and if he's matched to a CO Plat