In the first bar scene, where Cal loudly complains about his song not being played on the jukebox, the song he has selected is "Hard to Handle" by the Black Crowes.
When Cal and the hitchhiker girl drove towards the Minneapolis airport, the weather was cold, somber and gray, and there was a light dusting of snow on the ground. Yet once in the airport, when Cal was talking to his old schoolmate Jack, the camera view out the window of the airport showed a sunny sky and lots of greenery, with absolutely no snow anywhere.