American Airlines via ShermansTravel offers American Airlines 1-Way Fares to select Western U.S. Cities, with prices starting at $24.20. (On the ShermansTravel landing page, click on "here" in the top paragraph to see this sale; we found this price departing Detroit, MI, (DTW) with arrival in Miami, FL, (MIA) on November 28.) That's the lowest price we could find for select routes today by at least $19.