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
Home décor shopping has always been about inspiration. Whether flipping
An interesting infographic on the amount of digital data we
Through the first three quarters of iPad availability, Apple sold