Sacramento International Airport (SMF) is the primary commercial airport serving Sacramento, California, and the greater Sacramento Valley region. Located approximately 10 miles northwest of downtown Sacramento, it serves as a key hub for domestic travel and offers select international routes. The airport completed a major modernization project in 2011 with the opening of Terminal B, significantly expanding capacity and improving passenger amenities. It is operated by the County of Sacramento Department of Airports and handles millions of passengers annually. SMF serves as a focus city for Southwest Airlines and offers connections to major hubs across the United States, Mexico, and Canada, making it the second-busiest airport in the greater San Francisco Bay Area and Central California region.