CLE is a Continental hub. Delta flys in via Cincinnati or Atlanta. United flights are pretty rare. Northwest and Continental have some sort of unholy alliance which mostly gets you stuck in Detroit. However these are often the cheapest fares.
Batman suggests flying out of Manchester, NH also.
So they might get cheaper or they might not. Elizabeth did this once. It is a miserable route. Don't do this to yourself. I have no idea how we will get you from CLE to Oberlin, but we'll figure something out later.