The pilots put the lives of passengers and maintenance contractors at risk, Queenstown Airport Corporation (QAC) chief executive Steve Sanderson said.
The scenic flight pilots drove a car across the airport apron and down the main runway on Sunday, May 9, about midnight.
"They put people's lives at risk and abused their access privileges," Mr Sanderson said.
They had used their airside security access passes, "given with position, trust and status".
The men were seen by contractors working on the runway, and also recorded by security cameras.
Queenstown police investigated, but criminal charges were not pursued.
Mr Sanderson said QAC would not take any further action.
He understood the pilots accepted the trespass notices (which bans them from all airport land for two years) and were not seeking to challenge the decision.
The pilots had said they were not intoxicated.
Mr Sanderson declined to reveal their names, ages, or the company they worked for.
The car could have left behind "foreign object debris" on the runway, he said.
While airport firefighters conducted a full survey of the apron and runway each morning, any undetected debris could have had "serious consequences" for aviation safety.
A metal strip on a runway was blamed by investigators as the cause of the Air France Concorde crash in July 2000.
The jet took off in flames from Charles de Gaulle airport in Paris and crashed soon afterwards, killing 113 people.
Mr Sanderson said the security gate the pilots used was now closed and locked.
Airside gate access was being reviewed.
Personnel would have to enter through a single secure gate. Talks were under way for it being staffed by Aviation Security during airport opening hours.
"The key issue for us is, Queenstown Airport is no longer a regional airport.
It's gone through the threshold of becoming international, with high passenger numbers and high revenue, and security is paramount."
Civil Aviation Authority spokesman Bill Sommer, of Wellington, said yesterday the incident was reported as a security, not an operational, matter.
"We assigned a security investigator and he received reports from the aircraft operator and the investigation conducted by the airport company.
"He was satisfied with the investigation and the action was appropriate and the case was closed."
