Around 1 p.m., flights scheduled to arrive at Sea-Tac were circling or being diverted to other airports, according to data from the flight-tracking company Flightradar24.

Other plane-spotting channels on YouTube have attracted sizable audiences, including Airline Videos, a channel that has more than 800,000 subscribers and includes a livestream from LAX.

A passenger was taken into custody Saturday afternoon after making a “flippant remark regarding a bomb” aboard an Alaska Airlines flight at Seattle-Tacoma International Airport, according to ...

Passenger who made ‘flippant remark’ about bomb on plane at Sea-Tac taken into custody Alaska Airlines said the passenger made “a direct threat to the safety of the aircraft” while ...

According to Cooper, bomb threats at Sea-Tac are rare. While there have been a handful of incidents in recent years involving individuals mentioning bombs, those examples occurred inside the airport.