Originally Posted by
rankourabu
I know you are used to assigning seats online prior to departure - but Air Canada does not have that capability. Forget preferred seats - you are not getting one - and on top of that, the only way to assign ANY seat on a United award is to call in and face double digit call center wait times.
With the AC booking reference, you should be able to do it online now.
And as I'm surprised you didn't point out, UA makes it really easy to get the booking reference