Frontier and other airlines were at a standstill for hours after a massive Microsoft outage

David Goldman, CNN

(CNN) — A important Microsoft outage brought low-cost bearer Frontier Airlines and immoderate competitors to a standstill for hours aft a regulator halted departures. The crushed extremity was lifted precocious Wednesday night.

“Our systems are presently impacted by a Microsoft outage, which is besides affecting different companies,” Frontier said successful a connection connected its website. “We admit your patience.” The institution was offering refunds to inconvenienced passengers.

The Federal Aviation Administration said Frontier asked it to region nan airline’s departures crossed nan United States. A small aft 10 p.m. ET, nan FAA lifted nan crushed extremity connected Frontier.

The hose has cancelled 131 flights Thursday and delayed 223 others, making up astir 30% of its wide flights, according to information locator FlightAware.

Allegiant and SunCountry besides said connected their websites that they were having difficulties.

“Due to a world outage astatine a 3rd statement vendor, our booking, check-in, and trip-managing capabilities are temporarily unavailable,” SunCountry said connected its site.

“The Allegiant website is presently unavailable owed to nan Microsoft Azure issue,” Allegiant said.

Microsoft connected its Azure unreality package position study site, said that astir 6 p.m. ET, nan work went down for immoderate customers successful nan Central US region – “including failures pinch work guidance operations and connectivity aliases readiness of services.” The institution said it wished nan origin and is moving to hole it. A institution spokesperson did not instantly respond to a petition for comment.

Other airlines were unaffected by nan outage. United, Southwest and American Airlines said they were not impacted by nan outage.