Southwest Airlines, Delta Air Lines, United Airlines and Alaska Airlines are experiencing system-wide outages Monday leading to customers across cities in the U.S. complaining about flight disruptions.
United Airlines said the outage was impacting its ability to release paperwork.
Southwest Airlines responding to customer queries on Twitter said the outage affected all carriers using a particular system, without giving further details. Alaska Airlines in a separate tweet said it is working with the vendor to get the system back up.
Delta said it didn’t have a specific time frame for when the system issues will resolve.
