Queenstown Airport chief executive Colin Keel said robust plans would ensure the airport could respond at short notice to changes in alert levels.
"We are working closely across the airport community, as we have throughout the Covid-19 pandemic, to ensure the appropriate protocols are in place and clearly communicated to the travelling public."
A cleaning and sanitisation programme at Queenstown Airport had increased in January and had continued since.
"Hand sanitiser stations are in place throughout the terminal."
Invercargill Airport general manager Nigel Finnerty said seating had been adjusted at the terminal to reflect physical distancing requirements.