Flights are being delayed across Australia amid a technical issue preventing planes from taking off.

A large-scale IT outage is preventing Airservices Australia from processing flight plans.

Airservices Australia is responsible for the "safe, orderly flow" of planes taking off across the country.

Virgin Australia says there are "multiple delays across our network" tonight.

"The issue is preventing all Australian airlines from lodging or receiving approved flight plans required for take-off," Virgin said.

"As a result, we are experiencing multiple delays across our network. We appreciate the patience of all travellers as we work through a solution, and we will provide an update once more information is known."

Airservices Australia said some of its communication systems were being imp

See Full Page