Does CASM include landing fees If not, then I would guess they didn't make money?
The thing to keep in mind is that this is their AVERAGE cost per ASM over their entire route system. The cost for shorter city pairs is much higher than that for longer ones, since there are fewer miles to spread the costs over.
While their average CASM is $0.0741, the CASM for your short hop was likely much higher.
So, odds are for this particular flight, they may NOT have made any money...but overall they still are, as your ticket price gets computed into their average revenue per ASM (RASM) against their average systemwide CASM.
In other words, your cheap ticket is offset by millions of other not-so-cheap tickets elsewhere in their system.
"In this present crisis, government is not the solution to our problem - government IS the problem." - Ronald Reagan
Comments made here are my own and are not intended to represent the official position of Alaska Air Group