Even though you booked your own air check with the TA or Celebrity direct about using the cruiselines transfers.
We book our own air for the same reason and have gotten Celebrity transfers. Matter of fact our upcoming cruise puts us into Vancouver and we are using the transfers.
If you are a Captains Club member call their line and ask.
Also if you belong to the Capt Club you can request a deviation of airline and Celebrity waives that deviation fee.
__________________ Ready to Steer towards another cruise