Originally Posted by
malmostoso
To answer the question univocally we need to know your itinerary (FSD-ORD-FRA-JED?) and the booking class your ticket is in. Then it's easy to figure out what program to use. I would stick to UA or AC for low surcharges on awards and plenty of availability within north america (most likely your redemption target).
Okay, specific flight plan is:
FSD-ORD-FRA-JED-FRA-DEN-FSD
FSD-ORD is in Y, but the rest are in Z.
Being able to combine with MR, UR, or TY points is important to me, too. Domestic US use is NOT the most likely way I will use them. Only US location I'd consider is Hawaii (love singapore for that), but most likely for biz or F to Europe (why I need to combine with other currencies).