Originally Posted by turaluv

Asked on another thread and they redirected me to this one:

I'd like to transfer points from MR to Aeroplan and the reward flights Aeroplan have offered are on United (which is what I wanted, as I have silver on UA). Since the UA ticket will be issued by Aeroplan, will I still be able to purchase economy +? I don't want to wait til I check in as I'd like to ensure having the economy + seats prior to traveling internationally.