Outages blamed on malware still plaguing budget airlines

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A technology provider says a malware attack triggered a dayslong outage that has caused reservations systems to crash at about 20 low-cost airlines around the world.

The company, Radixx, said it noticed "unusual activity" around its reservations program on Tuesday. It did not describe the malware or say how it got into the program.

A spokeswoman for Radixx's parent, Southlake, Texas-based Sabre Corp., said Friday that the company was beginning to restore service to airline customers. Kristin Hays said the reported the incident to the FBI.

Radixx said its system operates separately from those used by some larger airlines that are Sabre customers. Radixx said information was not compromised.

The timing could hardly be worse for start-up Avelo Airlines, which can't process reservations as it prepares for its first flight next week in California. On its , Avelo apologized to customers and encouraged them to browse listings even if they can't book a trip.

South African budget airline FlySafair said it created a "mini booking platform" that let customers buy one-way tickets for flights through next Tuesday.

"We are not sure when we will be up again," the airline said on its website.

Vietravel Airlines, a new carrier in Vietnam, said it was doing system maintenance but was still selling tickets at airport counters.

Outages at airline technology systems happen regularly, snarling flights and making it impossible for customers to make reservations. In the U.S. alone, congressional auditors counted about one a month from 2015 through 2017.

Experts say it's partly because the systems often consist of layers of old and new technology that don't always work perfectly together.

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