I know you can find out from the DOT which flights are officially the most delayed, but I wondered if there were particular QX/AS flights (not just routes) that seem to be delayed most often?

For example, I noticed the evening PSC-SEA (QX 2109) is only on-time 22% of the time and I would guess with the exception of extreme weather destinations like BRW that QX flights would be the most delayed compared to AS mainline, but on the SEA-PDX shuttle, I can almost always count on an on-time departure morning, noon, and night (knock on wood).