Mexicana de Aviación, commonly referred to as Mexicana, was established in 1921 and is one of the oldest continuously-operating airlines in the world and the oldest airline in North America. It operates flights between more US gateways and Mexico than any other airline and also has the largest domestic network within Mexico. Mexicana flies to over 40 destinations in Mexico, Central America, the Caribbean, South America, Canada, and the USA. Current US gateways include New York (JFK), Baltimore / Washington International (BWI), Miami, Chicago O'Hare, Dallas / Fort Worth, San Antonio, Denver, Las Vegas, Portland, Los Angeles, Fresno, Sacramento, Oakland, San Francisco, and San Jose. Although Mexico City is the airline's primary hub, Mexicana also offers nonstop service from the US to several other destinations in Mexico including Guadlajara, Puerto Vallarta, Morelia, Cancun, and Leon / Guanajuato del Bajio.