San Francisco International Airport was subject to multiple FAA ground stops on November 9, 2026, due to dense fog conditions. These restrictions caused 187 flight delays and three cancellations by mid-morning as visibility fell to 0.13 miles.
The FAA's AI-powered SMART system has rerouted nearly 180 flights in six weeks, cutting flight times by over 10 minutes and saving fuel. It is expanding from Washington D.C. to multiple air traffic control centers nationwide while reducing delays and improving traveler experiences.