Brisbane Airport has been put on alert after two passengers on separate Qantas and Jetstar flights tested positive for Covid-19, sending two planeloads of travellers into isolation.
One of the cases waited for a connecting flight to Darwin for over fours on Friday before returning a positive test on Sunday night.
The 53-year-old who was flying from Newcastle to the Northern Territory via Brisbane, has also sent hundreds into isolation at Darwin Airport.
It comes after a Sydney traveller also tested positive for coronavirus on their first day of hotel quarantine.
Every passenger on board the QF516 flight were classified as a close contacts however passengers were already scheduled for 14 days of hotel quarantine after arriving from a declared Covid hotspot.
The 111 travellers on board Jetstar flight JQ484 will also have to go into isolation.
More to come.