Alaska Airlines canceled 70 flights on Monday, affecting more than 6,000 passengers due to an Internet outage that shut down its ticketing system for nearly five hours, the airline reported.
The outage caused significant delays for remaining flights - some by up to four hours - across the 64 airports served by Alaska Airlines and its Horizon Air subsidiary, the company said in a statement.
The airlines has about 38 daily departures out of Hawaii, including several between Kahului and the West Coast. It's unclear how many Hawaii passengers were affected.
A spokesperson for the airlines did not immediately respond to requests for information.
The airlines also canceled eight additional flights that had been scheduled for Monday afternoon and evening "to help return operations to normal." None of those cancellations were for Hawaii flights, but affected flights in and out of Las Vegas; Ontario and Orange County, Calif.; Portland, Ore.; San Francisco; and Seattle.
Alaska Airlines said passengers traveling Monday and today can change their ticket or request a refund by today and reschedule travel through Oct. 22 without incurring change fees.
Passengers whose travel plans were disrupted can contact the airline for compensation at (800) 654-5669 or through the "Customer Care" section at alaskaair.com.
The airline said that a Sprint fiber network cable had been severed in the Seattle area, which cut the carrier off from its ticketing system used for reservations and to check in passengers. Service was interrupted around 7:30 a.m., Pacific time, and was restored around noon.