Flights at Seattle-Tacoma International Airport were temporarily grounded on June 14, 2025, due to a suspected bomb threat. The airport closed both runways as a precautionary measure but has since resumed full operations.
The incident involved an Alaska Airlines Embraer E175 operating as flight 2123 by Horizon Air, which was taxiing towards the runway when it was stopped. "A passenger allegedly made a direct threat to the safety of the aircraft by speaking to a flight attendant during taxiing," according to The Seattle Times. The Port of Seattle Police and Fire Departments responded promptly, isolating the aircraft on runway 16R while conducting an investigation. Specific details of the threat remain undisclosed.
The situation led to significant disruptions, with data from FlightAware.com indicating that 525 flights were delayed or canceled. Most affected were Alaska Airlines flights, with 225 delays and 17 cancellations reported.