Fog blanketing Sydney has lifted and flights schedules are back to normal after hazardous conditions caused delays and diversions for travellers.
The Bureau of Meteorology has also cancelled its road weather warning for the city after conditions cleared before noon on Saturday.
Earlier in the morning, a handful of Qantas, Virgin Australia and Tigerair flights in and out of Sydney were delayed, cancelled or rerouted.
International passengers were delayed up to 30 minutes, a Sydney Airport spokesman told AAP, while domestic passengers were delayed between 90 minutes and two hours.
A Qantas spokeswoman said it transferred passengers from four cancelled flights to other services.
"It is all on track now, things are returning to normal, all flights are taking off as planned," the spokeswoman said after the fog lifted.
A BOM spokeswoman said the Sydney basin was cleared of fog, but low cloud cover could still affect elevated highways in other parts of NSW.
"Fog has cleared from most of the suburbs now, but there might still be some haze or patchy fog," meteorologist Katarina Kovacevis said.
On average, Sydney Airport experiences five fog events per year and most of them happen in late autumn or winter, she said.
"It is the season for it," she said.
"There's a chance of fog again tomorrow in the Sydney basin."
Australian Associated Press