San Francisco International is United's primary transpacific gateway and sits right on the edge of San Francisco Bay, which is why summer fog rolling through the Golden Gate is a routine cause of arrival delays. The current schedule feed lists 179 airports in 38 countries connected to San Francisco.
SFO Museum, founded in 1980, was the first accredited museum located inside an airport, and rotates exhibitions through the terminals — so a layover here comes with actual curated galleries.
San Francisco International Airport is the 32nd busiest airport in the world — it handled 54,532,613 passengers in 2025, according to ACI World's annual ranking.
The most frequently served routes for San Francisco International Airport connect to Los Angeles (LAX), Chicago (ORD) and Seattle (SEA).
The longest connected route for San Francisco International Airport reaches Bangalore (BLR). This flight covers a distance of 8,692 miles (13,988 km).