Another week, another glitch disrupting airlines from going about their business: this time, it was a disruption in Sabre’s computer systems affecting Southwest, Virgin America, and JetBlue’s online bookings.

Sabre provides technology services for the travel industry, and many airlines rely on its systems. Things should be back to normal now after technical difficulties struck Sabre’s systems last night, Bloomberg reports, preventing customers from making any online reservations.

“The technical issue that impacted some of our airline and travel agent customers has been resolved and our partners and subscribers are reporting that systems are back up and in recovery mode,” a spokeswoman for Sabre said.

Meanwhile, Southwest is “cautiously optimistic” that Sabre’s fix has resolved the issue, Tweeting that “Domestic booking functionality on Southwest.com is back up and running at this time.” Airport operations and international flights weren’t affected, Southwest said.

Virgin America also said on Twitter that its online booking system has been restored:

JetBlue confirmed to customers on Twitter as well that the glitch had been fixed:

Southwest, Virgin America, JetBlue Say Online Bookings Restored [Bloomberg]

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