While the couple (Charles and Alicia) are trying to escape Simon and Iris in the hotel, when Charles pulls the drapes from the window it is broad daylight with bright sunlight shining directly in. A few minutes later while running from the hotel it is dark, obviously hours, not minutes later.
An Oklahoma safety inspection sticker is visible in the windshield of the pickup seen in the beginning of the story which is supposed to be taking place in "Guthrie, Texas".