DIrishB
The Timeline Guy
Any chance there could be time zone changes that make it seem like things happening on the same day are on different days?
That's a distinct possibility. It's probably impossible to verify it since often it's not established exactly where they are while on the plane. It does usually specify which locations they travel to (with the exception of classified locations like the super villain prison, etc).
That may be a way to solve the problem of the extra few days.