Originally Posted by zoqfotpik

If you decide to go around the city without a car, like I do, there's the C-train which runs free along downtown. Beyond that you pay 3.25 (single ride valid for 90 mins) for adults. You can pay with cash/card on trains which you can purchase from the ticketing machine before you get on board. Buses on the other hand only accept prepaid tickets like passes, transfer tix or exact change.

There's currently a bus service running between Calgary and Banff which is available on weekends and holidays until September. This costs $10 one-way. As for transportation to/from the airport, sadly YYC isn't link to the train, yet (probably not until the next 100 years). however, there are express buses (BRT) which makes a few stops along the way. It probably takes about an hour between YYC to downtown this way. Another alternative is to take a shared-shuttle service like Calgary Allied Airport Shuttle Service. They charge $15 one-way from the airport and $10 going to. Pick up/drop off points are at most hotels in downtown. I happen to live just right across from a hotel so every time I need to get to the airport I just phone them to book. Taxis are plentiful, UBER as well, but expect to pay ~$30-40 plus tip.

edit: YYC-Banff bus service - http://onitregionaltransit.ca/banff-tickets/