I was in the Calgary airport a week ago, and I noticed multiple departures on the screen to Great Falls (Montana). I snapped a photo, as I've never even heard of this route being offered.

The afternoon departure is supposedly Air Canada 1230, departing at 13:17 Pm. I tried to price this out, thinking it might come in handy sometime if I want to do a mileage run out of GTF, but Air Canada doesn't even list GTF as an option.

So, I Expedia'd it, and there are no nonstops to Great Falls on Air Canada - just some interline options.

Can anyone let me in on what's going on here?