Originally Posted by
fransknorge
A few posts back in this thread. Basically if there are any seats available in Business you can ask the agent at checkin to upgrade you. No need for I availability. Same restrictions as online with regard to original fare classes. Due to lack of report, we don’t know yet if the upgraded segment earns miles at the original fare or for a C fare.
For upgrade from UPT to I, you earn miles from original fare. Hope this helps