In order to book an upgradable fare on United you have to buy a ticket in fare class W or higher. Here are the fare classes above W.
V
Q
H
U
E
M
B
Y
Only airlines could convolute something so simple as the ordering of the alphabet.
Related
Unless you were somehow seemingly off the grid earlier this
After my writing my last post on Lessons from Little
Man U recently announced it is partnering with Sony to