aircanada.ca will price it. Remember the flight only operates Fri, Sun and Wed. I did a dummy booking. $492 base fare, taxes & surcharges were another 50% of that!
Base Fare 492.90
NavCan, Fuel, and other Surcharges 105.10
Argentina Security Tax 7.80
Argentina Intl. Ticket Tax 29.90
Chilean Intl. Arpt. Facility Charge 93.00
Immigration tax 31.00
Total 759.70