If you need to get directions for both your original route and the reverse route, MapQuest can help!
To reverse your route stops, simply click the Reverse Route icon between your two route stops.
If you are looking at the written directions for your route, you'll need to use the Back button at the top of the left-panel to return to the screen where you can edit your route stops.
Please note: The Reverse Route icon only appears on two-stop routes. However, you can always use the Drag to Sort feature to manually re-arrange your route stops if you have 3 or more stops. See below!