1. Trek to Base Camp (17 days):
- Fly to Lukla (2,860 m).
- Trek for 12 days to Everest Base Camp (EBC) at 5,364 m.
- Spend several days at EBC for acclimatization.
2. Acclimatization and Camp Rotation (up to 35 days):
- Make multiple rotations between different camps higher up the mountain to help the body adjust to the altitude.
- These include the South Col (7,900 m), Camp 3 (7,162 m), and Camp 2 (6,400 m).
3. Summit Push and Return to Base Camp (11-19 days):
- Depart from Camp 4 (7,950 m) during a weather window for summit day.
- Push to the summit of Mount Everest (8,848 m) and return to Camp 4 on the same day.
- Descend to Camp 2 then Camp 1 and back to EBC over the next few days.
4. Trek Down to Lukla (5-7 days):
- Descend the same route back to Lukla, stopping at lower camps along the way.
- Trek for 5-7 days to Lukla.
Overall, the total time required for a return trip to the summit of Mount Everest, including the preparation, acclimatization, summit push, and descent, typically ranges from 60 to 70 days for most expeditions. However, it's important to note that conditions on the mountain can be unpredictable, and actual timelines may vary based on various factors. Proper planning, preparation, and the safety of climbers are always the top priorities in Everest expeditions.