Originally Posted by
qraec777
Data point : Transferred from BA to WS through YVR last night. When landing, the BA crew announced that all passengers, regardless of the final destination, must clear baggages and head for the next flight. We landed pretty early thankfully and that created a bit of a buffer zone for me. My bags were one of the first ones out (this was the first ever time that the priority tags worked on BA for me). The Westjet transfer desks were right after the exit, checked them in again and headed right away for the next flight on the other end of the terminal. It was a really easy process that was made extremely smooth by an early arrival into YVR.
So, if you have an upcoming BA->WS connection, you'll have to retrieve your bags at the first port of entry unfortunately, so plan your Intl->Dom connections accordingly.
Update : Recently transferred from BA to WS via YVR, and I was pleasantly surprised to find that BA to WS connections are now covered under OSS. I didn’t have to collect my bags at YVR, and the entire transfer process was smooth and easy compared to my previous trip. I didn't have to clear security to get on my next flight either. Just to note, this applies only to BA to WS connections. BA to AC connections still require you to collect your bags at YVR.