People want to travel from Kolkata to Tibet is not easy. you can’t directly fly to Lhasa. On the map, you can see them as not far from each other. also, the nearest seaport from Tibet is Kolkata.
Historically Kolkata ports play a huge role in the development of trade between Tibet and other Countries, as Tibet is a landlocked country. and also Kolkata being the capital of British India. consider very important relation with Tibet.
As borders between Tibet and India are closed for travel. they have two options for people who want to come to Tibet from Kolkatta,
The first option is Traveler must first fly to Nepal, then you can take car or flight to Lhasa
second option is traveler can flight to any major cities in China. then take a train or fly to Lhasa.
Traveling from Kolkata to Tibet via Nepal
There are many connecting flights between Kolkata and Nepal but not any direct flights. Several budgets and premium airlines fly on this route. You can easily check from popular websites. There are approximately 9 flights flying daily between Kolkata and Kathmandu from early morning to late at night. Vistara is the major airline that flies between Kolkata and Kathmandu. Most of the time it stops over at New Delhi.
Getting to Lhasa from Nepal can be done by a flight across the plateau, with some great views of Mount Everest along the way, or by an overland trip in cars across the border, which lies at ResuoBridge, between Rasuwagadhi Fort and Gyirong Port.
The flights from Kathmandu to Lhasa take between 60 and 90 minutes and cost around UK£190 each. This can depend on the airline though, and you can choose from three Chinese airlines that run the flights to find the best price. It is sometimes better to wait until you are in Nepal to book the flight, especially if you are traveling in Tibet with a group.
Traveling to Tibet from Kolkata via Mainland China
There are two ways to get to Tibet from China, by train or by flight. If you choose to fly, you can get a flight to Lhasa, the Tibetan capital, from Beijing, Shanghai, Guangzhou, Chengdu, Chongqing, Xian, Kunming, Shangri-La, Xining, Nanjing, or Xiamen. The closest city in China to Hong Kong that provides the flight to Lhasa is Guangzhou, which can be reached easily by flight or train. On average, flights to Tibet from China take between two and six hours and cost anywhere from UK£420.
There is also the option to take a train to Tibet, and this is often the most popular option for tourists. Trains run daily from seven gateway cities across China, which are: Beijing, Shanghai, Guangzhou, Lanzhou, Xining, Chengdu, and Chongqing. All the trains from the rest of China have to pass through Xining, in Qinghai Province, which is the start of the famous Qinghai Tibet Railway, the highest railway in the world. Costs vary from city to city for the tickets, and there are several classes of ticket you can get, although it is preferable to have sleeping compartments, as the train takes a long time to cross the plateau. From Xining, the train only takes 22 hours to get to Lhasa, but from Guangzhou, the longest trip, it takes 55 hours, so you are on the train for three days and two nights.