Delays, outages after potential cyberattack at Seattle-Tacoma Airport continue

System outages in the wake of a potential cyberattack continue to affect Seattle-Tacoma International Airport, commonly known as SeaTac, inconveniencing flyers for a third day .

Airport spokesperson Perry Cooper told USA TODAY Monday evening that there is still no timeline for a full restoration of the affected systems.

"We are doing what we can to mitigate the impact to passengers and airline partners," Aviation Managing Director Lance Lyttle said at a Sunday press conference .

Customs and Border Patrol and Transportation Security Administration officials said at the press conference that their systems were not affected by the potential cyberattack.

Cooper said that the primary customer facing systems impacted by the outages were flight information displays and baggage movement and information systems.

The airport posted on X, formerly Twitter, about the potential attack shortly after 9 a.m. PT Saturday and said that it had "isolated critical systems"

Lyttle said that multiple systems remained offline, including email. The airport's website remained offline as of 2:30 p.m. PT Monday.

A TSA representative posted on X suggesting that travelers to the airport check in for flights and print out boarding passes at home Monday, echoing previous advice from the airport.

Potential cyberattack frustrates passengers, minimal effect on airlines

Two airlines that use the airport as a hub reported that their operations had been minimally affected by the outages.

Alaska Airlines told USA TODAY its systems were not impacted Sunday, but "the one area where we are starting to see some impacts today is with the Port of Seattle’s baggage sorting system, so we are proactively warning guests who are flying out of Seattle to avoid checking a bag if possible."

Delta Air Lines said that impacts on its operations at the airport continue to be minor Monday.

The flight tracking service FlightAware reported that there were 6 cancelled flights and 375 delayed flights at SeaTac on Sunday. As of 5 p.m. PT Monday, there have been 218 delays and 10 cancellations at the airport. It is unclear if the outages were related to the delays.

This article originally appeared on USA TODAY: Delays, outages after potential cyberattack at Seattle-Tacoma Airport continue