Sydney Airport will be carrying out essential maintenance work on the main north-south runway and associated taxiways until 31 December 2023.

The work can only be carried out during the airport’s curfew, between 11pm and 6am and will occur on up to 70 nights.

Some of these nights will also be required due to the project being carried out in Sydney Airport’s south-east sector and the Sydney Gateway road project.

This means the limited number of overnight freight and other aircraft that can operate during these times will instead use the parallel north-south runway.

On average, there are currently between 11 and 18 such flights per night, half of which are departures and half arrivals.