The scene was horrifying ... people in Sint Maarten tell TMZ, the woman was hanging on to a fence at the edge of the runway, while an airliner revved its engines before rolling down the runway for takeoff.
We're told she couldn't hold on to the fence and was catapulted backward into a concrete barrier on the edge of the beach.
People on scene tried in vain to resuscitate her but it appears she died on impact.
A similar incident occurred in 2012 when a woman was blown into the same barrier, but she survived.
There are signs warning people not to stand in the pathway of the jet, but it has become one of the most popular things to do in Sint Maarten.