Question: I have 17K in Miles & More from one RT last summer and should get the same this summer when I do the same RT this July (DFW-IAD-ZRH-NSI). My travel agent said United is the operator (UA/LH/LX). Now which FF to choose- Mileage Plus or Miles & More? I thought I should do Miles & More because it would get my 17K FF points up to probably over 30K, which I can actually use. But, United might be more helpful for flying elsewhere. Which plan would you choose?