Does anyone have more information on United Fare Class, in particular
a. which fare is good saver awards in economy, business, first
b. upgradable vs non-upgradable fare

F, A, P FIRST CLASS
C, D BUSINESS CLASS
Z DISCOUNTED BUSINESS CLASS
Y, B FULL FARE (UNRESTRICTED) ECONOMY
H, M, E MODERITE-HIGH PRICED ECONOMY, SOME RESTRICTIONS
Q, V, W, S, K, L , T DISCOUNTED ECONOMY

Thanks