Well I threw in a RT CHI-EVV for March 13th, returning April 10th. Came back $274 on AA. Orbitz didn't show anything lower using their flexible date matrix display. Not sure if others have found better.

Now for my advice: The airline does not care that you are throwing away your return. You aren't using your return. Who says it has to be a round trip ticket? Screw buying CHI-EVV RT, buy an open jaw.

CHI-EVV on 3/13, returning SDF-CHI on 4/10 prices out to $185 on AA.com. Play around with open jaws. You'll find the cheapest fare there, unless you are in a market where there is a LCC who publishes cheap OW fares (like WN or FL).

Edited to add that I didn't notice that HomelessScientist gave the same advice earlier

[This message has been edited by whlinder (edited Jan 19, 2004).]