So What Happened To The Plane?

[NoraBrimstone]

It crashed after travelling for hours in the wrong direction. Something happened to make someone turn the plane, whether it was a hijacker, the pilot, or someone else, who knows? It's possible that somehow (possibly due to a struggle?) cabin depressurisation occurred, leading to hypoxia which could have rendered everyone on board unconscious and the plane could have just continued on until it ran out of fuel and crashed.