Anyone know if its possible to use the Cap1 travel portal to book an Air Canada Flex fare for transborder travel. Looking to purchase an AC fare, and was hoping to use the $300 annual credit, but don't see an option to book a flex fare instead of the base standard fare on the portal (for the record, vs. a standard fare, flex fare offers advance seat selection, a free checked bag and no change fee - looking for a bit more flexibility on this.

And speaking of the $300 credit, anyone know if the credit is refreshed based on calendar year or approval date? I just looked at the welcome letter and doesn't seem to indicate either way.