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
Earlier this month NetFlix increased the price of their
Axios CEO Jim VandeHei writes about the conflict brewing between
Jonathan Turley wrote last week that more surveillance would not