Four passengers tested positive for COVID-19 in the early hours of December 17, but all arrived at SEA on December 16, 2020.
The first passenger arrived on Alaska Airlines flight 1199 from San Diego International Airport (SAN), and moved through Concourse C, baggage claim, and the international ticketing area.
The second passenger arrived on Alaska Airline flight 2141from Phoenix Sky Harbor International Airport (PHX), and moved through Concourse C, baggage claim, and the international ticketing area.
The third passenger arrived on American Airlines flight 578 from Phoenix Sky Harbor International Airport (PHX), and moved through Concourse D, baggage claim, and the international ticketing area.
The fourth passenger arrived on Alaska Airline flight 753 from Raleigh-Durham International Airport (RDU), and moved through Concourse C, baggage claim, and the international ticketing area.
