The Boeing 767-400ER is United Airlines’ least used aircraft this year after a handful of planes came out of long-term storage in time for the summer season. This move was partially due to the grounding of some Boeing 777-200s. On United’s list of least used aircraft, the 767-400ER comes out on top, but is followed by the 737 MAX 8, 787-8, CRJ-700, and 787-10. Let’s take a look at where the 767-400ER is flying these days. | Simple Flying