Originally Posted by Jaimito Cartero

How many miles were you charged?

Originally Posted by colpuck

I is the star alliance business class reward seat bucket. you will lounge access I think in YYZ, maybe depending on AC rules.

*A reward buckets are as follows:

X is economy
I is business
O is first

AC "sells" their domestic first as business for reward purposes, while UA and US both sell them as first "O." This doesn't matter so much for UA members, but for OAL members trying to book US and UA premium cabins find themselves paying the higher three-cabin rate.