Flights were delayed on Saturday as a system failure affected airlines at Cape Town International Airport.
Passengers could not be checked in online and had to be checked in manually, a spokesperson for ACSA said.
Mark McClean, Acting General Manager at Cape Town International Airport, said all systems had been brought back online by 13:00.
"Some airlines experienced challenges with the check-in system due to a failure in the system, and this resulted in a delay as check-ins had to be done manually," said McClean.
The check-in system failed due to an IT network failure, he added.