Stolen Horizon Air Q400 "Sky King" Flight Out of Seattle

This reconstruction covers a death by suicide. We have made it because the controllers' work deserves to be understood, and we have handled the audio with that in mind rather than for shock.

On the evening of 10 August 2018, a ground service agent at Seattle-Tacoma International Airport boarded an empty Horizon Air Q400, started both engines, and took off without clearance.

What followed was not a chase. It was a conversation — one of the strangest and most humane exchanges ever recorded on an air traffic control frequency.

What controllers were actually doing

The immediate assumption, when an aircraft is taken, is that everyone in the sky is now in danger. Sea-Tac is one of the busiest airports on the US west coast, sitting under converging approach paths, with a dense metropolitan area beneath it.

So the first job was traffic. Aircraft had to be moved, held, and rerouted around an aircraft whose flight path nobody could predict.

The second job was harder, and it is the one people remember. Controllers had to keep him talking.

Across roughly 74 minutes, he spoke with controllers at Sea-Tac and with controllers at Joint Base Lewis-McChord. Two separate facilities, two separate frequencies. Two F-15s were scrambled to intercept.

The part most versions of this story miss

Almost every published edit of this incident uses a single frequency — usually Sea-Tac's, because that is the feed most widely archived.

That leaves out the McChord side entirely.

It matters, because the tone of the two conversations is not the same. What you hear on one frequency is a controller managing an emergency. What you hear on the other is people trying, in real time and with no training for it, to give a man a reason to land. One controller talks him through where the runway is. Another simply keeps him company.

Anyone who has listened to a lot of ATC audio will tell you that controllers are trained toward a flat, unhurried delivery precisely so that stress does not travel down the frequency. On this recording, you can hear that training holding — and you can hear the moments where it strains.

How it ended

The aircraft came down on Ketron Island in Puget Sound. He was the only person aboard, and the only person who died.

The subsequent investigation focused on airside access — how someone with legitimate credentials for ground operations was able to move an aircraft — and on the aviation industry's approach to employee mental health, which has changed meaningfully in the years since.

A note on sourcing

The ATC audio from this incident is widely available in the public record and was captured live. Everything in ours comes from publicly available recordings.

If you are struggling, help is available. In the US, call or text 988. In the UK, call 116 123. Elsewhere, the International Association for Suicide Prevention maintains a directory of local crisis centres.