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
We’re six days out from the start of CES. Here’s
Several changes are underfoot which could be shifting the direction
The future of senior care is no longer limited to