Southwest, United, American and Delta, JetBlue and Alaskan airlines are facing customer backlash after computer outages caused flight delays, according to various Twitter announcements Monday.
Southwest spokesman Dan Landson said there was an outage with a vendor that services multiple carriers with data used in flight planning. American Airlines has also tweeted about the issue, but did not specifically say it is was "system-wide".
According to posts from airline social media accounts, the issues impacted flights system-wide.
Details of an aircraft's weight and how it's distributed on board is required before a flight can take off.
Airlines across the United States were suffering delays Monday morning due to an outage of a computer software.
There are delays already at airports in Chicago, New York, Boston, Atlanta, Miami and Detroit.
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The outage is affecting flights from airlines that include Southwest, Delta, and Jet Blue, The Washington Post is reporting. A brief third-party technology issue prevented some Delta Connection flights from being dispatched on time this morning has been resolved.
Southwest had 585 delays at 9:06 a.m.in NY, according to flight tracker website FlightAware.com, while JetBlue had 199.
Southwest said it had an "internal ground stop" for about 40 minutes and that "scattered flight delays are anticipated".
Airlines were recommending that flyers check their flight status online or with the airport they would be traveling out of.
Delta added: "I completely apologize, we are now experiencing a System-Wide Outage we are working diligently to get it back up and running".