AC Bag Through Checking
 

Hello, I'll be flying from LHR to LAX via YYZ (with overnight stay), and then back from LAX to LHR via YYC (again, with overnight stay). Can I check bags through to the end destination, or do I need to collect them at YYZ (and YYC), take them to the hotel and bring them back next day?

Many thanks, Maurice

On your outbound journey you will have to collect your bags regardless to go through US Customs and Agriculture pre-clearance. My bet is that they will label your bags to YYZ only and the following morning you will need to re-check them and walk them through the inspection area and place them on the belt on the other side.

I don't know about the way back though doing an international to international connection.

I am not sure it will work like this, as usualy you can only have your bags checked a few hours in advanced...