A pair of United Airlines (NYSE: UAL) Boeing 737 jets made contact with each other on the evening of Monday, September 1st, 2025. The incident occurred at San Francisco International Airport (SFO), when a pushback maneuver resulted in United Airlines Flight 1871, which was bound for Denver International Airport (DEN), clipping the tail of a parked aircraft nearby, which was scheduled for a departure to Boston Logan International Airport (BOS).