On June 14, 2025, Seattle-Tacoma International Airport experienced a significant disruption as authorities shut down two runways following a direct security threat aboard an aircraft. The incident, which unfolded just after 1 p.m., involved Alaska Airlines Flight 2123, operated by Horizon Air, bound for Walla Walla, Washington. A passenger made a direct threat to a flight attendant while the plane was taxiing, prompting the crew to secure the aircraft away from the terminal and alert law enforcement.
Port of Seattle Police and the FBI responded immediately. The suspect was taken into custody without incident. All 68 passengers and four crew members were safely evacuated, returned to the terminal, and subjected to additional security screening. The Federal Aviation Administration (FAA) issued a ground stop, meaning flights bound for Seattle were held at their departure points, and delays rippled across the airport. At least six flights were canceled and two others diverted as a result of the incident.
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Impact on Airport Operations
The Seattle airport shut down affected air travel for several hours. Two runways were closed for safety and investigation, leaving only one operational. Emergency vehicles and law enforcement gathered near the affected aircraft, visible to travelers and onlookers. Gate holds and taxi delays increased, with average delays reported between 16 and 30 minutes, and some flights facing delays of up to an hour and 40 minutes. The ground stop was initially scheduled to last until 2:45 p.m., but the situation de-escalated earlier, allowing the center runway to reopen and some normalcy to return.
Passengers and crew remained calm as authorities conducted thorough security checks. Alaska Airlines praised the professionalism of its crew and thanked passengers for their patience. The airline confirmed that all guests would be rebooked and assisted to their destinations as quickly as possible.
What Travelers Need to Know
If you’re planning to fly through Seattle-Tacoma International Airport in the wake of this incident, here are key points to keep in mind:
- Expect Possible Delays: Despite the reopening of the center runway, residual delays and cancellations may persist as operations normalize.
- Stay Updated: Airlines and the airport are providing real-time updates. Check your flight status before heading to the airport.
- Security Measures: Enhanced security screenings may continue temporarily for affected flights and passengers.
The nature of the threat has not been disclosed, and authorities continue to investigate. Travelers are reminded that safety remains the top priority, and cooperation with airport staff and law enforcement is essential.
Moving Forward After the Seattle Airport Shut Down
While the Seattle airport shut down caused inconvenience for many, the response demonstrated the effectiveness of emergency protocols and the dedication of airport personnel. As the investigation continues, travelers can expect heightened vigilance and ongoing communication from airport officials.
For those impacted, airlines are working diligently to minimize disruption and ensure safe passage to final destinations. The incident is a reminder of the importance of robust security measures and the need for everyone to remain alert and cooperative in the face of potential threats.
Are you planning to fly soon? Check your airline’s website or app for the latest updates and allow extra time for security procedures.