Originally Posted by neuromancerLKLB

Return leg on business class itinerary KOA-PRG in Z class, KOA-LAX is waitlisted since ticketing, cannot upgrade using miles - United told me: "Since the flight from KOA-LAX was purchased in Business class fare, we are unable to upgrade it using miles". Although we have confirmed B class can't even reserve exit seats just to be sure in case we ended up in economy. Do not know why, I am able to pick the exit seats in Manage my trip seats will not be saved in the reservation. Any thoughts how to proceed? Thanks in advance.