Continuity mistake: During the Charger/Mustang chase scene you see Steve McQueen's Mustang skid around a lot of corners. If you look at the street you can see the skid marks from the previous takes.
Continuity mistake: During the chase scene where the Charger crashes into a parked white car, the screen blinks red to give the illusion of a strong impact. However, after the split second blink is finished, the car magically repairs itself and the Charger completely disappears.
Continuity mistake: When Bullitt leans over to read the piping chart, the coat he has draped over his shoulder changes from neatly pressed and folded to wrinkled (and folded differently) between full shots and close-ups. (00:18:30)
Continuity mistake: During the chase, Bullitt's Mustang skids off the road and kicks up a huge cloud of brown dust that engulfs the car. It should now be coated with dust, but in the next shot of it speeding away, the Mustang is sparkling clean again. (01:14:05)
Answer: Airport security in the late 1960's was not nearly as thorough as it is in present day. Metal detectors didn't become commonplace at airports until the early 1970's.
BaconIsMyBFF
It was the D.B. Cooper hijacking of a Boeing 727 commercial jet in 1971 that radically changed how airport security was handled. Before that, there was virtually little to no pre-boarding security checks.
raywest