The Los Angeles County Metropolitan Transportation Authority and other agencies operate an extensive system of bus lines, as well as subway and light rail lines across Los Angeles County, with a combined daily ridership of 1.7 million. With 1.4 million daily boardings, the ridership on Los Angeles’ bus network is second only to that of New York. The city’s subway system is the ninth busiest in the United States and its light rail system is the country’s third busiest. When considered as a single entity, the rail network averages roughly 319,000 boardings per weekday.. However, Los Angeles’ mass transit system does not have high per-capita ridership relative to other large cities. Altogether, 11% of Los Angeles commuters use public transit (including both bus and rail),.

The rail system includes the Red and Purple subway lines, as well as the Gold, Blue, and Green light rail lines. The Metro Rapid buses are a bus rapid transit program with stops and frequency similar those of a light rail.

The main Los Angeles airport is Los Angeles International Airport (IATA: LAX, ICAO: KLAX). The fifth busiest commercial airport in the world and the third busiest in the United States, LAX handled over 61 million passengers and 2 million tons of cargo in 2006

The Port of Los Angeles is located in San Pedro Bay in the San Pedro neighborhood, approximately 20 miles (30 km) south of Downtown. Also called Los Angeles Harbor and WORLDPORT LA, the port complex occupies 7,500 acres (30 km²) of land and water along 43 miles (69 km) of waterfront. It adjoins the separate Port of Long Beach.

The sea ports of the Port of Los Angeles and Port of Long Beach together make up the Los Angeles – Long Beach Harbor. There are also smaller, non-industrial harbors along L.A.’s coastline. Safety is provided at the only beach controlled by Los Angeles City by the highly trained Los Angeles City Lifeguards.

The port includes four bridges: the Vincent Thomas Bridge, Henry Ford Bridge, Gerald Desmond Bridge, and Commodore Schuyler F. Heim Bridge.