Southwest Airlines flights delayed after Amadeus IT system outage

Southwest Airlines passengers faced severe delays across the United States on Friday morning after a computer system outage forced airport staff to check in bags and board flights by hand.

The technical issues began during the busy morning travel window, with passenger reports spiking shortly before 9:00 AM Eastern Time. The airline attributed the disruption to a temporary system failure at Amadeus, the global travel technology giant that handles its reservation and boarding software.

Why were Southwest Airlines flights delayed?

While some travellers posted on social media that Southwest had grounded its entire fleet, the airline rejected claims of a total shutdown. A spokesperson for Southwest said flights were "not halted, just slowed due to manual processes" while workers waited for systems to come back online.

With digital systems knocked offline, airport check-in desks and boarding gates quickly descended into old-school manual operations. Gate agents were unable to scan barcodes on digital boarding passes, and terminal staff resorted to hand-writing luggage tickets for checked bags. Travellers were advised to ignore their mobile apps and instead monitor physical airport screens for updates on their flights.

What caused the Amadeus IT outage?

Amadeus, which provides critical IT services to dozens of international airlines, confirmed that the issue did not originate within its own core network but was caused by a third-party technology partner.

"Amadeus briefly experienced a technical issue today affecting Southwest Airlines, originating from a third-party technology provider," the company said in a statement. The firm added that its teams took immediate action to resolve the issue alongside the provider, but did not identify the partner or explain the exact nature of the software failure.

Data from the outage tracking website DownDetector showed a sudden surge in passenger complaints regarding Southwest starting just before 9:00 AM Eastern Time.

When did Southwest Airlines systems recover?

By mid-morning, Southwest said that full system functionality had been restored, though the carrier did not specify how many flights were delayed or how long it would take for schedules to return to normal.

Southwest apologised to passengers for the inconvenience and said it was working to get travellers to their destinations as quickly as possible.

The breakdown exposes the vulnerability of the modern aviation industry to single points of failure in its digital infrastructure. Amadeus is one of a handful of dominant software providers that manage the highly complex, interconnected databases behind airline bookings, check-ins, and weight-and-balance calculations. When these platforms fail, airlines have little choice but to slow down operations and process passengers individually, leading to immediate backlogs at major hubs.