The helicopter ride from Kathmandu to Everest Base Camp is a day tour with
the duration ranging from 4-5 hours maximum. The time schedules and the
durations are like this:
Wake up at 5.30 and transfer to the airport by 6 am ( half an hour)
Get through security process and get ready for take off( 15 minutes)
Take off and fly to Lukla ( 20 minutes)
Refueling at Lukla ( 15 minutes)
Fly to Everest Base Camp ( 20 minutes)
Land at Kalapattar and make video and photographs ( 20 minutes)
Fly back to Hotel Everest View ( 15 minutes)
Have snacks, tea, coffee or breakfast at Hotel Everest View ( half an hour)
Fly back to Lukla and refueling ( 20 minutes)
Fly back to Kathmandu ( 20 minutes)
Land at the Kathmandu airport and drive back to Hotel ( 30 minutes)
So the total duration including landing at Kalapattar and refueling at Lukla
will be between 4-5 hours in total. Why not trying Everest Base Camp Helicopter
Tour if you have 4-5 hours to spend in Kathmandu as you are going to witness
Mt. Everest, the highest in the world landing at Kalapattar(5545m).