Airline Stocks Turbulent After Microsoft Outage Grounds Major Carriers

On Friday morning, major U.S. airline companies found themselves temporarily grounded due to unforeseen communication challenges.

Notable among these carriers were American Airlines (NASDAQ: AAL), Delta Airlines (NYSE: DAL), and United Airlines (NASDAQ: UAL). This occurred shortly after Microsoft (NASDAQ: MSFT) reported it had resolved an outage affecting its cloud services, a disruption that had previously impacted several budget carriers.

Prior to this collective grounding, low-cost carriers such as Frontier Airlines, a branch of Frontier Group Holdings, Allegiant, and SunCountry had already reported operational disruptions due to technological outages. Frontier Airlines speculated that a "major Microsoft technical outage" was the culprit, while SunCountry vaguely attributed their issues to a third-party vendor's system failure without naming names.

U.S. Secretary of Transportation Pete Buttigieg reassured the public that the Department of Transportation was closely monitoring the scenario, emphasizing that airlines must fulfill their obligations to passengers. Buttigieg's watchful eyes were particularly focused on Frontier, which had announced it was maneuvering back to regular operations after lifting a ground stop.

Meanwhile, Frontier canceled 147 flights and delayed another 212 on the preceding Thursday, as tracked by FlightAware. Allegiant faced its own storm with delays affecting 45% of its fleet, while SunCountry saw 23% of its flights take off behind schedule. The precise numbers for the overall impact of these flights remained under wraps.