As Louise enters the bar, her hair is flat. When she is shown inside, suddenly, her hair is permed.
After Louise takes a shower, Sherman helps her put her uniform top on, but there is no sign she puts on or is wearing any other clothing. However, as the scene continues, Louise is seen wearing a type of pants/shorts as they walk together.
Before traveling back in time to 1963, Louise watches a film montage to familiarize herself with American culture of that year. However the film includes a brief shot of an American astronaut performing a space-walk, which first happened in 1965. Also there is footage of Marilyn Monroe who had died in 1962.
The movie shown during the doomed flight is Deliverance (1972). In-flight movies are usually of films still in theaters, so showing a 1972 film on a 1989 flight makes no sense.