Originally Posted by
Clipper801
Yes except OP (if he/she had purchased OMW) could have requested to be put on an earlier flight on another airline to YVR. OP would also have been able to do it over the phone.
I guess in that case, I probably would have had to buy OMW with AC at the time of purchase, which would have been a problem since I bought my tickets from United and this was sold as a code-share...