Factual error: When they are in Costco there is music playing in the store. Costco does not play music in their stores.
Continuity mistake: When Sarah is trying to convince The Frog to help them, The Frog's glasses alternate between being worn and being in his hand from shot to shot.
Continuity mistake: When Han and his team land at Teterboro, N.J. you see part of the tail code G-MPSP on the port (left) wing when they walk away from it. After Frank and his people steal the same plane it is shown taking off, but no tail code can be seen on the port wing.
Character mistake: On the tour boat in London, the voice on the loudspeaker says 'if you look to your right, you will see the Tower of London'. Except it's on the left, given the direction the boat is travelling.
Continuity mistake: At the end when Frank brings a suitcase with a bomb on the plane where Bailey is pointing a gun at Sarah, he puts the suitcase on a table. When Frank drops his gun, the table is empty. The suitcase reappears a second later when Sarah goes to Frank.
Revealing mistake: When Han is firing the Gatling gun at Frank and Marvin, he is on one side of the street, firing across the street and through the parked cars. Frank and Marvin are lying on the ground on the sidewalk, but some of the bullets' exit holes (after shooting through the vehicles) fold inwards, when they should have bent the metal outwards.
Revealing mistake: When Han is firing the chain gun at Frank and Marvin in Paris, the shell casings and links are shown. The shell casings have crimped ends which are used in blanks.
Continuity mistake: In the scene at a "Russian" air base, the US troops, along with Anthony Hopkins, are surrounding and about to board a Russian made AN-12, NATO codename Cub, with US AIR FORCE painted on the side. When it subsequently takes off, the aircraft no longer has the lettering on the side and appears to be footage of an older unrelated AN-12 edited in.