We have a thread explaining this..
http://www.lostdiscussion.com/forum/...s-spoiler.html Just watch the episode again. Jack says at the end of the flash FORWARD when he meets up with Kate at the airport (he did NOT know Kate before the crash) and I paraphrase here "Every week I travel to Asia, hoping that the plane crashes and I can go BACK to the island" Now if it was a flashback why would he say BACK?