Oh! Forgot to mention my own routing suggestion. This was actually seen on kayak for a paid ticket a while ago, but...

DLH-MSP. Usually a short nonstop flight. Unless you went DLH-DTW-ABE-EWR-MSP. Did I mention that ABE-EWR is done on a bus? Not an airbus, mind you, but an actual bus with wheels that go round and round?