text: Union Pacific and BNSF Railway, the two largest railroad networks in North America both service Stockton and its port via connections with the Stockton Terminal and Eastern Railroad and Central California Traction Company, who provide local and interconnecting services between the various rail lines. The Stockton Diamond was the busiest interchange point in the state by 2020; a grade separation project to elevate the Union Pacific over the BNSF line is planned to be completed by 2026.
  Air
  Stockton is served by Stockton Metropolitan Airport, located on county land just south of city limits. The airport has been designated a Foreign Trade Zone and is mainly used by manufacturing and agricultural companies for shipping purposes. Since airline deregulation, passenger service has come and gone several times. Domestic service resumed on June 16, 2006, with service to Las Vegas by Allegiant Air. The days of service and number of flights were expanded a few months later due to demand. Air service to Phoenix began in September 2007.
  On July 1, 2010, Allegiant Air implemented non-stop service to and from Long Beach. In 2006 Aeromexico had plans to provide flights to and from Guadalajara, Mexico, but the airport's plan to build a customs station at the airport was initially rejected by the customs service. However, the possibility of building this station is currently a continuing matter of negotiation between the airport and the customs service, and Aeromexico has indicated a continuing interest in eventually providing service. Ground transportation is available from Hertz, Enterprise, Yellow Cab and Aurora Limousine.