Originally Posted by fairviewroad

But that still doesn't explain where the plane comes from that departs CVG at 9:30 for CUN. The plane that arrived the previous night presumably left for DEN earlier in the morning. So there was still a repo flight from XXX-CVG.

Or for that matter, what happens to the plane that arrives from CUN into CVG at 15:47? It's not needed for the next morning's flight to DEN, so it must be repo'd somewhere else.

And if the repo flights are still needed, then it's not an explanation for why the DAY flights shifted to CVG.