Hi.
I would like to ask for the cost of gudie and sherpa of two following tekkings:
-Langtang- Helambu inculding climbing Thergo Ri (5.000m) for three
people. Trekking should start from 30.09.
-Everest Solu Khumbu inculding climbing Island Peak (6165m) for three
people, climbing only for two. Could you please answer either there is
a possiblity to have a flight from Namche Bazar to Kathmandu? One of
us have to come finish treking after 10 days.

The only flight likely from Namche to KTM would be a charter helicopter, which will cost around $3000.

For langtang,Helmabu trek and including Tsergo ri and Guiding and porter is total cost for 16 days trip total USD $ 2300 for three person including all the food,accomodation,permit,Transportation in the trekking.
For 16 days everest trek including Ice land peak climbing,Lodging,fooding,porter,guide and for climbing guide,flight for both way,porter including total of three of you cost is USD $ 3280.
There is not direct flight from Luklha to kathmandu so you have to come down to the Luklha.