Thank you! Great to have a visual.
Taxis wait at the airport. No issue. Expect that cab ride to be probably the longest of your entire trip. The airport is on outer limits of the city. Although it makes for a nice drive though Quebec city.
Depending what street your hotel is on you may be able to hail one. You may have to have the front desk call you one.
If you cab to the old town then you can walk the rest.Edited: 15 October 2018, 13:45
Can’t imagine why you would need an “international” app to use Uber. We just have a regular app on our phone and it works flawlessly in a number of Canadian cities (so far) as well as in Fort Lauderdale. Maybe for countries outside of North America you might need one but not for Canada.
Getting a taxi (or Uber I would imagine) at the Quebec City Airport is likely the same as at all other major Canadian airports - easy! Most airports have taxis lined up waiting for fares and as soon as you materialize at the taxi pick up point, the next one in line will suddenly appear. Also most major Canadian airports have someone like a ‘taxi coordinator’ or dispatcher that oversees the operation - he/she will ensure that you get the next taxi quickly - don’t know if Quebec has such a system though.
As has already been said, since you say that your hotel is in the center of town, everything you are likely to see and do is within easy walking distance.
Uber app works all over the world. I've used it in Germany, US, Canada, and Australia. That said, a taxi ends up being the same price and it right outside where others have given you the details. Taxis have always been more convenient to me. You do need data of some sort or wifi for the Uber app, too, so there's data roaming charges and such to consider if you don't have int'l data or a plan that includes Canada.
Expect it to be basically 40$CAD with tip, btw. It's a fixed rate 35,10$CAD to the old town. The same happens for the ride back. Your hotel can arrange a taxi and there's no surcharge.