Originally Posted by
Rejuvenated
Sorry for not being clear, I meant in general for many airlines. CX for example treats "I" as the lowest possible booking class for business class (often in promos). For award business, "U" is their designated booking class.
No worries.
But even I is not always business class related... even at AC, pre-the C -> I change, I was part of the dreaded RINGPET Tango fare classes.
Simon