United Fares

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

The following was published in Dealerscope in November 2007: The

I’ve fallen drastically behind in keeping my travel log up-to-date.

Apple surprised to the upside (though it really shouldn’t be