Currently, there are multiple ways to get to Tibet from the U.S. The best way from the U.S. to Tibet is to take an airplane through the major cities in China such as Beijing, Shanghai, Guangzhou, Hongkong and Chengdu because only those cities have direct flights from the U.S. After that, you can transfer from those cities to Tibet. There are multiple itineraries you can choose from. For example, you can set out from the JFK International Airport in New York to the PEK International Airport in Beijing, the non-stop flight takes only 13.5 hours and costs about USD730, By the way,If you have the Tibet visa for us citizens , traveling to Tibet from the U.S via Kathmandu, Nepal is also popular among American travelers. The prices of flights from the USA to Kathmandu various from US$1,200 to US$1,400 depending on departure location and connections. Once you arrived in Kathmandu, you can take a flight to Tibet or travel to Tibet by road. There is a daily flight to Tibet during the peak & ordinary tourist season and only takes about 1.5 hours to Lhasa.