Originally Posted by
riphamilton
.... this was originally booked as a K fare pre-hurricane, but i had to change dates because of the hurricane. it then booked into B. i would presume that’s the reason for ZK, .....
Nowadays UA will many times catch irrop rebookings into a higher fare and give you the fare class you booked/purchased. Years ago you might have kept the irrops rebooked fare class, now it is more common for UA to catch this. Unfortunately, this was a risky thing to count on.