<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by El Boocho:
I know it is not a lot of miles, but I do believe that 25K (50K in some circumstances) may be protected by moving them to Amtrak's program. From there the miles may be moved to CO or Midwest Express (or what ever they are calling themselves these days).</font>
Unfortunately, you got that backwards. You can trasfer CO miles to Amtrak Guest Rewards (and from there, into UA or other partners), but you cannot transfer UA miles to Amtrak. It's a one-way street.