Autumn Veatch was on the plane with her step-grandparents Saturday traveling to Montana when it crashed in the state's northern stretch of the Cascade Mountain range, The Seattle Times reported.
Reported missing and feared dead, Veatch tried to pull her step-grandparents from the crashed plane and then followed a river to a road before making her way to a nearby store, the paper said.
After hiking through the rugged mountains Veatch hadn't had anything to eat or drink for days, a first responder told the newspaper.
Crews are still searching for the plane, the paper reported, and authorities have not confirmed the fate of the step-grandparents or said what may have caused the crash.