Without Banff, things would be different for YYC no doubt, but it would likely be a hub, only to a lesser degree.No way, eh. Pretty much this attitude why I would never purposefully assist in making Calgary a major international hub airport in Canada. Calgary would be nothing without Banff and would be just another airport spoke, and with the AC Calgary de-hubbing in progress, this may help other regional airports to attract more direct continental and international flights. I'm not saying YWG will ever get to the level of Canada's big three airport, but less Calgary competition will help both Winnipeg and Edmonton become a bit more competitive, and that is great for the rest of us.
If Banff didn’t exist there’s a good chance YWG would be almost exactly where it’s at today. With Calgary being double the population of Winnipeg and Alberta more than triple the population of Manitoba, YYC would still a much busier airport than YWG.
Due to it being busier, airlines would still be trying to funnel traffic from other prairie cities through YYC. It wouldn’t be as pronounced as it is today, but for Winnipeg it wouldn’t be much different. Traffic would get funneled more often to cities like Toronto instead.
Edmonton and YEG has been the most affected by Banff, and YYC. If Banff never existed, who knows maybe YEG might have become a main hub instead of YYC. Or if only oil had never been discovered maybe Winnipeg would be the hub of the West. The list of hypotheticals is endless but In the end Banff and Calgary do exist and things are what they are.