Originally Posted by AHO
At least
NOT for UA MileagePlus.
I have experience of it.
I suspect UA limit their members to use his/her miles on another *A partner. (Because then UA have to pay some kind of compensation to their *A partner. Which they don't want to do.)
AFAIK, LH/SK/AC/NH have same availability for their *A partner award when I checked with ANA's Online *A Award Booking System.
What exactly was your experience? One should have the same access to award seats on STAR flights with UA/MP as we do with other programs. It is true that UA charges you less than many other programs for the same trips, and that it does have to pay STAR carriers, whereas it only does an internal transfer for seats on its flight, but I've never faced the problem with Aeroplan and often find it is easier to get award seats on STAR carriers flying to the same destination that it is getting seats on AC flights.