Jiri to Namche Bazaar trek is the best option to do the Everest Trek. This trekking route is less crowded than the other treks because few trekkers they just fly to Lukla and then walk only few high portion of the route. From Namche Bazar you can go to the route which follows Everest Base Camp. You can also take another route which will be count as 30 days treks. For this 30 days trek you can walk to Tumlingtar, instead of flying from Lukla.
This trek is consists of many amounts of up and down walking. The rivers of this trekking part flow south from Himalayan Glaciers but the trekking route goes to east and therefore you will have to climb up and down. This is the harderst trek with many step hills.
Itinerary:
Day 01 - Jiri to Shivalaya
Day 02 - Shivalaya to Bhandar
Day 03 - Bhadar to Sete
Day 04 - Sete to Junbesi
Day 05 - Junbesi to Nhuntala
Day 06 - Nhuntala to Bupsa
Day 07 - Bupsa to Chablung
Day 08 - Chablung to Namche Bazaar
The best season to do this trekking is from the month of October to May.