She was returning after pilgrimage in Kailash Mansarovar in Tibet. She arrived in Simikot on Sunday.
According to reports, Leela died of decreased level of oxygen in her body. The body is still kept in cold storage at the Simikot airport as the flights have been disrupted due to bad weather since June 31.
Every year, hundred thousands of pilgrims from India and other countries visit Mansarovar. Many take the route of Humla via Nepalgunju to reach Mansarovar.
As the flights have been disrupted, almost 400 passengers including many Indian tourists were stranded at the Simikot airport.