Air New Zealand's new check-in online service has been a huge hit, with more than 6,300 customers checking in over the internet since it went live.

Available to all Air New Zealand domestic customers, the innovative new service allows passengers to select their own seats, check-in and then create their own boarding passes with their printer at work or home.

Air New Zealand Group General Manager Short Haul Norm Thompson said the airline was thrilled with the strong uptake from passengers.

"The number of online check-ins has more than tripled since we first trialled the service on direct flights between Auckland, Wellington and Christchurch seven months ago, increasing from 1,900 check-ins last week to over 6,300 this week," said Mr Thompson.

"This confirms our belief that there is a strong appetite for online services in both the main centres and regions, with customers telling us they love selecting their own seats and they're saving valuable time by heading straight to the gate with their printed boarding passes," said Mr Thompson.

The new check-in online service is one of a series of internet-based initiatives introduced by the airline in the last 12 months such as the hugely popular "grabaseat" campaign which introduced long haul fares for the first time this week to Los Angeles and Shanghai.