The first thing you need to know is that Avion cardholders have way more redemption options then the non avion RBC rewards cards.
All RBC Rewards Cards can trasfer points to WestJet rewards and Hudson's Bay Rewards at a rate of 1:1 and can be redemmed for travel at a rate of 1 CPP. You can also redeem for merchendise at around 0.8 CPP, gift cards at 0.7 CPP, statment credits 0.6 CPP, RBC finical products 0.8 CPP, charity at 1 CPP.
Avion card holders have the same options as the RBC Rewards cards along with the fixed points flight chart, and the option to trasfer points to British Airways Avios, Cathay Pacific Asia Miles at a rate of 1:1 and to American Airlines AAdvantage at a rate of 1:0.7.
Assuming you can get the the max price for a ticket you would get:
|Canada & U.S. Short Hual||2.3 CPP|
|Canada & U.S. Long Hual||2.1 CPP|
|Summer North America||2 CPP|
|North America||2 CPP|
|Rest of the world||2 CPP|
If you have a RBC Avion Visa Infinite Privilege or are a member of RBC Private Bank you have the option to redeem first class and business class seats at a rate of 100 Points to $2 CAD or 2 CPP.
Down sides are mostly that if you don't get the highest price your CPP drop drasticlly, and you can't buy premium ecnomy, buisness (except VIP and Prive Bank), or first class.