https://www.mercurynews.com/2019/09/09/more-delays-at-sfo-tangle-travel-plans/

San Francisco – Flight delays caused by runway construction continued to vex and frustrate air travelers Monday morning at San Francisco International Airport.

Arriving flights have been delayed at average of nearly four hours, affecting out-bound traffic as well, according to the Federal Aviation Administration’s Air Traffic Control System Command Center. The FAA recommends passengers check with their individual airlines for specific delays and cancellations.