South Australia will reopen its border to those flying in from the ACT from midnight tonight, Police Commissioner Grant Stevens announced today. But the soft border closure with NSW will remain in place.

The news comes after suggestions from Premier Steven Marshall in recent days that the state could reopen its border to both NSW and ACT this week.

The ACT update will only affect those flying into our state. Flyers will be required to complete a pre-approval form online and must declare they haven’t been outside a Safe Community Transmission Zone in the 14 days before travelling to SA.

People driving from the ACT into SA will still be required to quarantine for 14 days (because their journey will take them through NSW).

Stevens said the earliest the state would open to NSW would be in 10 or 11 days, provided there's no further community transmission with an unknown source.