AZ's pax M11s currently operate to IAD
and possibly DEL/BOM only.
They have begun cargo conversion on M11s with two in service already and usually route mxp-jfk-ord so you possibly saw. According to the PA, what you saw was the M11F routing ORD
(AZ 9117 which was sked to depart JFK
Some see lines, others see between the lines.