Jetstar says it is "smoothing out" processes to ensure its new regional flights run on time after complaints of delays.
The airline says one Napier to Auckland flight was delayed for just over half an hour yesterday and the Herald has heard complaints of other holdups.
Jetstar has been operating Napier - Auckland - Nelson services for just over a week and within that time a pilot was flown from Australia to cover illness. A spokesman said that was done to ensure it didn't cancel any flights.
The Jetstar regional services are operated by QantasLink carrier Eastern Australia Airlines.
Passenger demand has been heavy for the services which led to a price war with incumbent Air New Zealand on the routes.
"We're very focused on providing an on-time experience for our customers on both our regional and main trunk services. Our commitment is backed up by our performance in 2014 as New Zealand's most on-time domestic airline," the Jetstar spokesman said.