Southwest Airlines Co. is pushing its supplier to fix customer service problems that emerged following a $500 million upgrade of its outdated reservations system.
The carrier is leaning on Amadeus IT Group SA to resolve issues with its Altea program that replaced Southwest’s 30-year-old, mostly home-grown technology. There have been at least five technical outages since August, with most of those blocking passengers from accessing the airline’s website to check in or manage reservations.