12 Hainan Airlines shutterstock_377562616.jpg

Shutterstock/Angel DiBilio

The Chinese airline, the fourth largest in the country, has moved from 22nd to 12th in just 12 months. Starting December 2, they will offer a non-stop flight from Beijing to Las Vegas, the first-ever such service. Customers give the company very good reviews in almost all areas, but note that the airline needs to improve its in-flight entertainment and ground service.