I am flying out of YYT early on Sunday, with a connection (one flight a day) in YYZ. There is already a special weather statement from Environment Canada and I am wondering if I can proactively ask to be rebooked on a flight to YYZ on Saturday to ensure I make the connection on Sunday. Or do I have to wait until AC issues a travel advisory. I'm reluctant to do the latter, as flights out of YYT will be packed this weekend as the holidays end. I haven't contacted the concierge yet as I would like to know what to expect and what can reasonably be asked for. On a latitude fare in case that matters.

Thanks.