Roger Ebert said, "The sexiest thing in the new Derek Flint misadventure, 'In Like Flint', is Flint's cigarette lighter, which is supposed to know eighty-two tricks, but actually delivers only five, of which one is the not extraordinary ability to clip Lee J. Cobb's mustache"
According to the audio commentary on the DVD, Fox wanted to do another Flint movie but James Coburn turned them down.
Feature film debut of Herb Edelman.
Near the end of the movie, the President shouts "For God's sake, let us sit upon the ground / And tell sad stories of the death of kings" and "Once more unto the breach, dear friends". These are both quotations from plays by William Shakespeare: the first from "Richard II" (Act 3, Scene 2); the other from "Henry V" (Act 3, Scene 1).
The W.P. Lear Sr. listed in the credits (his character co-pilots Flint's Lear Jet) is William Powell Lear, the inventor of the Lear Jet.
The title of the movie was taken from a popular saying "in like Flynn", referring to the actor 'Erroll Flynn (I)''s womanizing. Thus, "in like Flynn," refers to a man's quickly successful sexual escapades.
This was the final film that Twentieth Century Fox produced in its CinemaScope process. Later productions shot in anamorphic widescreen would use Panavision or other optics.
ZOWIE stood for Zonal Organization World Intelligence Espionage.