San Diego International Airport (SAN)

San Diego International Airport operates through two main terminals that are currently undergoing significant modernization and expansion as part of a comprehensive redevelopment program. Terminal 1 primarily serves Southwest Airlines and select other carriers with domestic operations, while Terminal 2 accommodates Alaska Airlines' West Coast hub operations along with major carriers including American, Delta, United, and international airlines serving routes to Mexico, Canada, and seasonal European destinations. Terminal 1 features a linear concourse design with gates arranged for efficient Southwest operations, emphasizing quick turnarounds and point-to-point service typical of the airline's business model. Terminal 2 offers a more extensive layout serving Alaska Airlines' hub operations and other carriers, with gates distributed across multiple concourse areas connected by moving walkways and shuttle services. Inter-terminal connections require exiting the secure area and taking shuttle buses or walking via the landside connector, adding 15-25 minutes to transfer times. Security checkpoints are located in each terminal with TSA PreCheck and CLEAR lanes available in both facilities. Wait times vary by terminal and time of day, typically ranging from 15-25 minutes during off-peak periods to 45-75 minutes during peak morning departure banks and summer travel season when San Diego experiences high leisure travel volume. The airport's single runway operation can create departure delays during peak periods, affecting overall processing times. International operations are distributed between both terminals with customs and immigration facilities including Global Entry kiosks and standard CBP processing areas. San Diego serves as an important gateway to Mexico, particularly Baja California, with strong leisure and business connections. The airport also handles seasonal service to Canada and Europe, primarily during peak travel seasons when demand supports expanded international connectivity. San Diego's terminals reflect the city's laid-back coastal culture with amenities including restaurants featuring California cuisine, craft beer from local San Diego breweries, and fresh, locally-sourced ingredients, retail shops highlighting surf and beach culture, San Diego sports teams, and California products, and multiple airline lounges including Alaska Airlines Board Room and American Admirals Club. The airport emphasizes its connection to San Diego's perfect weather and outdoor lifestyle with design elements throughout the terminals, while the ongoing modernization project will significantly expand capacity and improve passenger amenities including new restaurants, shops, and transportation connections including the recently opened trolley extension providing direct rail service to downtown San Diego.