Kathmandu, 13 June: The Tenzing Hillary Airport in Lukla has remained close for the last one week due to the bad weather. Since last Sunday, flights have not been operated due to the adverse weather, said Dwarika Achhami, chief, Civil Aviation Authority in Lukla. Above 150 tourists are stuck in Lukla due to the halt of flight operation. Many of the tourists return to their destinations by road, said the airport authority.