Anachronisms: Aircraft not from the story's time period are visible outside the airport terminal near the end of the film.
Anachronisms: As Sam is walking to his boarding gate, both a Southwest Airlines and an America West Airlines aircraft can be seen in the background. America West Airlines did not exist until 1983, and Southwest Airlines did not begin service to BWI until 1993.
Continuity: As Samuel Bicke is about to board the plane, an announcement is made that the TWA flight to Atlanta is about to board. On the news, it is announced as him boarding a Delta flight.
Anachronisms: The news on TV first shows the speech of President Nixon answering the House Judiciary Committee Subpoena for Additional Presidential Tape Recordings where he says "the boil must be pricked" from April 29, 1974. Later in the movie the news mentions Robert Preston landing a helicopter on the lawn at the White House the previous evening but that event occurred on February 17, 1974.
Factual errors: From the PA announcement we learn that Bicke will be boarding a TWA flight. In one shot of the aircraft a red pointed cheatline (stripe painted near the windows) is seen which would have been part of TWA's 1972 livery. However, when we see the exterior of the boarding door from the jetway, the Delta Air Lines "widget" (a red triangle and a blue triangle) can be seen.
Factual errors: Julius Bicke is shown wearing a wedding ring. He is a fervently Orthodox Jew, and such Orthodox males do not wear wedding rings as a matter of religious principle.