My friend insisted we return via heli to Ktm after beautiful trek to Langtang. And luckily TRA host such itinerary. Be booked instantly and flew to Kathmandu for the trek. The team received us from airport and the very next day we drove to Syabrubesi. From there trekked for 4 days to Tsergo Ri, and descended to Tsona lakes and hopped on a heli to Kathmandu. It was wonderful experience.