A Virgin Australia spokesperson told the Sydney Morning Herald that "all flights at Sydney Airport are now grounded until further notice due to an air traffic control issue".
Frustrated passengers have been told a "nation wide system fault" is the cause of all flights out of Sydney being grounded.
As a result, only a limited number of flights were able to land and depart.
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The missile is believed to have a range of about 1,250 miles, making it capable of reaching a large portion of the Middle East. The missile is named as Khorramshahr and was displayed in Tehran today in front of local media and thousands of spectators.
There are long queues at check-in and transfer desks.
"Flights are delayed due to an @airservices system issue".
Some of the country's major airlines have put on extra services to ease the disruption.
Some flights were also canceled.
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A La Verne police officer was injured and a suspect was shot and wounded during an altercation early Saturday, authorities said. An officer ordered the man to drop the item but the man refused and continued to move toward the officers, Moore said.
Ms Ibbottson said the airlines had not handled the situation well.
"The backlog here has to be cleared before we can even look like going to Hobart", Ms Wallace said.
The ABC understands the fault related to the flight planning system. The report explained that without it, controllers can not see which plane is which.
Domestic passengers at the airport tweeted photos of a departures board with flight status reading "delayed - due ATC radar failure".
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Lavrov added that a collapse of the Iran nuclear deal would give North Korea little incentive to drop its nuclear programme in return for sanctions relief.
Travellers should contact their airline for flight updates.