Delta Airlines issued a statement early Friday morning announcing that all flights were paused as they work through a technology issue.
The issue arises as multiple major airlines, including American Airlines and United Airlines, issued similar statements.
The three airlines and Allegiant Air grounded flights less than an hour after Microsoft said it resolved its cloud services outage that impacted several low-cost carriers, according to Reuters.
An American Airlines Boeing 737 Max takes off from Miami International Airport on Dec. 29, 2020 in Miami, Florida. (Joe Raedle/Getty Images / Getty Images)
The FAA said all flights, regardless of destination, have been affected.
Microsoft said via X they were "working on rerouting the impacted traffic to alternate systems to alleviate impact in a more expedient fashion" and that they were "observing a positive trend in service availability."
Microsoft says service went down for some customers in the central United States around 6 p.m. ET, "including failures with service management operations and connectivity or availability of services."
A logo sits illuminated outside the Microsoft booth at ISE 2024 on January 30, 2024 in Barcelona, Spain. This year the 20th edition of Integrated Systems Europe (ISE) is being held, the sixth in Barcelona. The hall occupies the entire surface of the (Photo by Cesc Maymo/Getty Images / Getty Images)
They also stated on their services health status page and X that they are "continuing to see an improvement in service availability across multiple Microsoft 365 apps and services. We're closely monitoring our telemetry data to ensure this upward trend continues as our mitigation actions continue to progress."
Officials have not said how long it will take to resolve the stop, but an update is expected later Friday morning.
Reuters contributed to this report.