Well we do know what the people on the Plane came form the same point in time.

I guess the ting to think about with this that no one has brought up... is this:

I know we might need another flashback from another OTHER... but how did juliet get there? did they fly her there ? planes cant land... unless they are sea planes. but those have tons of windows and shorter distance capablities. The windows comment came into play becuase i wonder if they keep the islands location hidden from her, as they brought her there.

Maybe a sub to keep off radar aswell as keep the location a secret. Helicopter shares the same issues as a sea plane.