The massive IT outage on Friday affected numerous industries ranging from banks to media companies, and services have been coming back online after the outage was resolved.
Airlines' passenger check-in systems, which had been affected by the global outage, have returned to normal, CCTV said in a Weibo post, citing Airport Authority Hong Kong.
The airport authority had said on Friday that affected airlines had switched to manual check-in and flight operations had not been affected.
Globally, 5,000 out of 110,000 scheduled commercial flights were canceled on Friday.