There are check-in delays at Auckland and Wellington airports after Immigration NZ's national system went down earlier this morning.
The computer glitch meant people couldn't complete the check-in procedure.
Just after 1pm, Immigration NZ confirmed the technical issue with its advanced passenger processing had been resolved.
"It was out of action for three hours this morning as a result of a global issue,'' a statement said.
The Auckland Airport website still showed at 1.20pm several flights had either been delayed or rescheduled.
There were also major delays at Sydney, Melbourne and Brisbane airports due to the computer software problem.
News.com.au reported that a global computer software system, which allowed airlines to check passports, was down.
A Melbourne airport spokeswoman told the publication: "This system is used globally, so the issue affects many other airports as well as Melbourne".
An Auckland Airport spokesman said it had an impact on passengers wanting to leave Auckland today.
Immigration New Zealand national manager for borders Senta Jehle confirmed earlier there was a technical issue with its Advance Passenger Processing (APP) system.
It had not been working since 9.30am.
When passengers check in overseas, APP validates their entitlement to travel to or through New Zealand. Passenger information entered into airlines' systems is screened against Immigration New Zealand's database at time of check in. Check- in agents are now relying on manual checks with INZ staff to verify information, Jehle said.
Australian airports also use the APP system.
A spokesman for Wellington Airport confirmed the outage affected them too. The system system allowed airlines to report on the border clearance process.
