The attack and the Port’s response to isolate critical systems resulted in an outage that shut down WiFi at the airport, caused delays to baggage services, and disrupted many screens inside the terminal showing flight information.

Airport workers had to resort to manual methods, such as writing flight numbers and carousel locations on large sheets of paper and issuing handwritten boarding passes and bag tags.

The outage did not impact flights or security checkpoints at Sea-Tac Airport, or cruise travel.