To hop onto the SA topic…LIM being gone is particularly aggravating for me personally.
But I guarantee AC got killed on this route last year. Travel advisories during the duration of the high season. My last flight was 9/30 in J last March (the peak of high season in a good year), with the entire e-up list (15+ pax) getting cleared at the gate. My rev J fare was something like $950 each way from YVR-YUL-LIM (they were alternating YYZ and YUL twice each weekly).
Still, it baffles me why we can’t at least get a UA codeshare through IAH or EWR. The BOG Avianca routing is a special kind of awful from YVR.