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
Vaccine Distribution has been abysmal. Governor Cuomo issued an executive
What apps are downloaded (or conversely not downloaded) tell us
We’ve already seen some fragmentation of video distribution services and