I buy several DEN-YYC award tickets a year. total cash $60.
So a cash ticket might include a $50 Canada security and YYC development surcharge.
They charge that much because they can. capacity was reduced so much that they always have full planes and no competition.
Flying with thru SFO only on the way back halved the ticket price for me in May when I needed to go to SFO too for a meeting