Hello there

I hope i'm posting in the right section. Me and my gf will be Flying to CUN in August. We are both swiss holding biometric (and valid ) passport. We depart from ZRH with AC to YYZ (AC 879). From YYZ to CUN with AC (AC 1812).

Q #1 : Do we need to collect luggages at YYZ or they will go straight to CUN?
Q #2 : We already have transit authorization for Canada, AFAIK we don't need any other document for Canada (transit) and CUN (we stay there for 9 days).

The return is different:
CUN to EWR (UA 1051) and EWR to ZRH (LX 19) but same questions apply. We already have valid ESTA for transit.

Many thanks for your reply.