Thank you very much.
Airport fees in general include landing fees, terminal fees, terminal improvement fees and security-related fees. Flying a large jet in the Quebec regions—it wouldn't really be practical, since the population size wouldn't justify it—would cost me less than flying a small regional plane.
For example, here are a few numbers: if I fly a plane carrying 30 passengers, landing in Dorval costs me $240, but if I fly a jet carrying more than 100 passengers, the fee is $306. That's a considerable difference between the two in terms of cost per seat.