<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by FlyByMike:
Buy a one way ticket DC-Chicago and then buy Chicago-DC-Chicago roundtrips that are discounted due to a Saturday night stay. Then buy a one way back to DC when you're done commuting.</font>
Exactly. I have been commuting between Dallas and LAX for over 2 years using this method.