On two of my trips (same airline, same kind of plane 777), I noticed that the airplane took very different routes (from New York to UAE).
1st Trip in 2012 (blue): Duration 11h 30m
2nd Trip in 2013 (green): Duration 13h 00m
I know that the blue line is the shorter distance, and probably also because of jet streams, it took lesser time. But why a plane would take this green route, even not considering jet streams?
Since I am not an important person, I could not ask the captain of the plane this question at the end of journey.
P.S.: I observed the flight paths on the entertainment system this airline has for all passengers.