Sacramento International Airport is an international airport located in Sacramento, California, northwest of Downtown Sacramento and covers . It is the primary airport serving the Sacramento Metropolitan Area, and it is run by the Sacramento County Airport System. The airport is one of 4 airports serving Sacramento, the others being Sacramento Mather Airport, Sacramento Executive Airport, and Franklin Field.

The airport is also a gateway to various attractions in Northern and Central California, such as Heavenly Mountain Resort, Lake Tahoe, Yosemite National Park, Old Sacramento State Historic Park, California State Capitol, Wine Country, Yolo Bypass Wildlife Area, Cosumnes River Preserve, Sutter's Mill and Marshall Gold Discovery State Historic Park and Sacramento–San Joaquin River Delta.

Excluding all military type airfields, cargo and general aviation only airports, SMF Airport, at is the largest commercial/public airport in the entire state of California in terms of land area.

History Sacramento International Airport (SMF) opened on October 21, 1967, as Sacramento Metropolitan Airport (the airfield itself was Sacramento Metropolitan Field), with one 8600-foot runway. The initial runway was on the west side of the airfield and is now named to the headings of 17R/35L. Previously, air service to Sacramento was handled by Sacramento Municipal Airport (SAC), now known as Sacramento Executive Airport. Sacramento Metropolitan was the first purpose-built public-use airport west of the Mississippi when it opened in 1967. All airports under the Sacramento County Airport System (previously the Sacramento County Department of Airports), including SMF, are self-supporting through user fees and rentals. No local, state or federal tax funds are used for operating costs.

The airport initially had five airlines: Pacific Air Lines, Pacific Southwest Airlines (PSA), United Airlines, Western Airlines and West Coast Airlines.

1980s and 1990s In the 1980s, SMF added: the in-flight catering facility (1980), an FAA Flight Inspection Field Office (1985), a second air cargo facility (1985) and the east runway (1987). The east runway's opening was celebrated by the landing of a Concorde SST. America West Airlines, Continental Airlines, Morris Air, Northwest Airlines and American Eagle Airlines joined the original carriers at Sacramento Metropolitan Airport during this time.

In 1998, the consolidated rental car facility and Terminal A (designed by Dreyfuss & Blackford Architects) opened. The consolidated rental car terminal was the first of its kind in the nation and gave all rental car customers a single point of access that could be reached on a single shuttle. This innovation streamlined bus operations to reduce congestion at the terminal and improve air quality while enhancing customer service.

With the opening of the new Terminal A, the airport was renamed Sacramento International Airport, though it did not receive international flights until 2002 when Mexicana started nonstops to Guadalajara. The airport was designated a port of entry on October 5, 2006.

The Sacramento County Airport System launched its website in April 1997.

Southwest Airlines (1991), Alaska Airlines (1993), Horizon Air (1993) and Trans World Airlines (TWA) (1994) were added to the list of carriers at Sacramento. Southwest and Alaska Airlines grew quickly, offsetting the departure of airlines such as American Eagle, Continental and USAir which had acquired PSA.

21st century: New challenges, opportunities and growth September 11 did not deter growth at Sacramento International Airport. Four airlines were soon added to Sacramento International: Continental returned (2000) and Frontier Airlines (2002), Mexicana Airlines (2002), Hawaiian Airlines (2002) and Aloha Airlines (2003) initiated service. Mexicana's arrival initiated international nonstop flights and necessitated the completion of the International Arrivals Building for federal inspection services.

The Terminal A Parking Garage opened on September 23, 2004. The six-story structure had covered parking, a short walk to the terminal and public art ("Flying Gardens" by Dennis Oppenheim) installed outside the garage, and "Flying Carpet" by Seyed Alavi, installed in the connecting walkway.

In 2006, Sacramento International Airport was one of the first airports in the nation to offer free wireless Internet service (WiFi).

Industry churn As the nation's economy was taking a hit in 2008, commercial aviation was challenged by reduced passenger numbers and increasing fuel and other costs.

Prior to the downturn, new services began and several airlines merged. America West and US Airways merged, Northwest and Delta merged, and United and Continental initiated their merger by the end of 2011. Despite these challenges, Alaska added nonstop flights to Guadalajara, Mexico (now discontinued), and Hawaii (Maui) while Aeromexico's (2011) debut reestablished foreign-flag service with daily nonstops to Guadalajara, Mexico. The new Terminal B opened on October 6, 2011, the largest airport terminal in the United States to achieve LEED Silver status.

On June 5, 2008 US Airways began seasonal flights to Charlotte and Philadelphia. Sacramento was the origin for the last scheduled MD-80 flight on Alaska Airlines, Flight 363 from Sacramento to Seattle on August 24, 2008. In the summer of 2010, Delta Air Lines began seasonal flights to Detroit. Continental Airlines, which later merged with United Airlines, previously had seasonal flights to Newark. Sacramento's seasonal route operated during the summer and fall. On January 6, 2013, Frontier Airlines ended service to Denver. In January 2019, Hawaiian Airlines retired its final Boeing 767-300ER aircraft when Flight 19 arrived at Honolulu from Sacramento, after which the Sacramento–Honolulu route was operated using Airbus A330 aircraft.

Sacramento County tried (and failed) to entice Virgin America into adding a flight between SMF and Los Angeles by offering the airline $400,000 to operate out of terminal A or $150,000 to operate in terminal B; other airports were also trying to entice the airline.

Recent developments On July 6, 2013, the airport was one of ten airports that hosted flights diverted from San Francisco International Airport after Asiana Airlines Flight 214 crashed short of the runway.

On December 17, 2013, Aeroméxico began seasonal service to Del Bajío International Airport.

On November 18, 2014, United Airlines announced it would suspend service to Washington D.C. from January 6, 2015, to April 6, 2015, citing seasonal demand. On May 4, 2015 Delta Air Lines started service to Seattle–Tacoma with the flights operated by SkyWest Airlines. On December 3, 2014, United Express ended service to Arcata/Eureka and Crescent City. On February 9, 2015, SeaPort Airlines began service to Visalia. On June 18, 2015, JetBlue Airways started seasonal service to Boston. On April 8, 2015, Southwest Airlines started service to Dallas–Love. They also announced (later in the year) service to Boise beginning January 6, 2016. On March 26, 2015, Aeroméxico started service to Mexico City. In the month of May, American Airlines added a fifth flight to Dallas Fort-Worth.

On April 23, 2015, the airport announced that it had posted twelve consecutive months of improved passenger traffic that started in April 2014, and 8.9 million passengers were served in 2014. Passenger growth continued in 2015 and 2016, with 9.6 million passengers served in 2015 and 10.1 million in 2016. In 2017, the airport surpassed its 2007 high of 10.7 million passengers, with 10.9 million passengers. Amongst the 35 largest metropolitan regions in the country, Sacramento has the fewest international flights.

In 2016, American Airlines announced that it would begin flying between Sacramento and Chicago O'Hare beginning in June with twice daily flights for the summer season and a single nonstop the rest of the year.

In 2017, Southwest added nonstop service to Long Beach and Spokane, Air Canada resumed its nonstop service to Vancouver, and United added nonstop service to Newark.

In 2018, Southwest added nonstop service to Austin, New Orleans, Orlando, San Jose del Cabo, and St. Louis.

By 2019, Southwest added much-awaited service to Honolulu and Kahului, exemplifying the evolution and growth of Sacramento International Airport as well as its burgeoning route network offerings, especially in the 2010s.

On June 15, 2023, the Sacramento County Department of Airports announced funding had been secured for the construction of a new air traffic control tower to replace the original tower that had been in place since the airport opened in 1967. The new tower will be constructed at a site located on the north side of the Airport. It will stand 192-feet in height and the current cost estimate is between $60 million and $80 million. Construction is expected to finish by 2026.

Solar power In January 2018, Sacramento International Airport's solar array was commissioned; it is rated at 7.9 MW and will supply around 30% of the airport's electricity needs. The electricity will be purchased by NRG Energy for an agreed period of 25 years. The project was built by Borrego Solar using LG solar panels at a cost of $15 million. The solar power costs 7 cents per kWh as opposed to 9 cents, so the airport expects to save nearly $1 million annually.

SMForward and potential new terminal

On February 1, 2023, the airport announced a $1.3 Billion dollar expansion that would surpass the Big Build project as the largest expansion in the airport's history. Called SMForward, this expansion covers the first 5 years of expansion that will ultimately lead to the completion of the 20 year Master Plan envisioned in 2020. Over the next five years, the airport plans to build complete the following: Building modifications that will add three new gates. Two new gates in Concourse B and one new gate in Terminal A. Construction started in July 2024 and to be completed by spring 2025. The projected cost at $16.5 million. A new $140 Million pedestrian walkway that will be adjacent to the Automated People Mover (APM) that can be used as an alternative to the APM and can connect passengers to a potential Concourse C. Construction started in the summer of 2024 and to be completed in the Spring of 2026. A concourse expansion that will add another 6 to 8 new gates on the western side of Terminal B. Construction is expected to begin 4th quarter of 2025 and be complete in the 4th quarter of 2028. An expansion of the Terminal A lobby to add a new baggage claim carousel and additional ticketing space. Construction is expected to begin in the 2nd quarter of 2026 and be complete in the spring of 2027. A new 5,500 space parking garage that will replace a parking lot adjacent to Terminal B. Construction started in the Fall 2024 and to be completed by the 4th quarter of 2026. A $55 Million consolidated transportation ground transportation center that will allow ride-share services, taxis, and shuttles to serve both Terminals. Construction is expected to start in the summer of 2026 and be complete by the summer of 2027. New Terminal A exit road for a better flow to traffic and a more efficient shuttle system. Construction is expected to start on the 3rd quarter 2025 and be complete by the 3rd quarter 2026. A $390 Million rental car facility south of the parking garage adjacent to Terminal A. This will allow passengers to walk from either Terminal to access the rental car service. Construction is expected to start N/A and be complete by N/A.