Why Travel from Tibet to Nepal
There is no a single reason that you have to travel from Tibet to Nepal instead of traveling from Nepal to Tibet. No matter which way you take, the landscape and experience are always the same. But for some specific circumstances, you are suggested to travel from Tibet to Nepal, rather than the opposite route:
1. If you already have a Chinese visa, you can finish you trip in destinations in mainland China first, then go to take your tour in Tibet. The Chinese visa is not valid for entering Tibet from Nepal. Only the Group Visa is qualified. After your Tibet tour, you can directly leave for Nepal if you have a plan in Nepal, or want to return back home from Nepal, so that you don’t have to get back to mainland China to catch your flight back home.
2. If you worry about high altitude sickness, you are suggested to travel from Tibet to Nepal because you can have plenty of time for acclimatization for the high altitude before getting to the Mount Everest and border area. Lhasa has an average altitude around 3700m, which is the best environment to adjust your body to the high altitude and thick air. While the altitude of Kathmandu is only around 1400m.