Watch: Air New Zealand's newest plane constructed in impressive time lapse video over five weeks

Air New Zealand has released behind-the-scenes footage of one of its new Airbus planes being built.

The A321neo, one of 14 as part of a new Airbus fleet announced in September, took five weeks to build.

It was brought in in pieces inside a large Airbus plane before construction began at the Airbus Delivery Centre in Hamburg, Germany.

The aircraft was then put together and given a black paint job to finish with a silver fern decorating the back end and tail.

The Kiwi airline formally took delivery of the aircraft on Thursday and is currently completing a four-day journey from Hamburg to Auckland via Oman, Kuala Lumpur and Cairns with a small team of nine on board. It's expected to arrive in Auckland late on Monday evening.

The A321neo aircraft feature a new layout with 214 seats - 46 more than the current international A32 fleet Air NZ is using.

The A321neo will be used in both domestic, Tasman and Pacific Island services.

Air NZ also said customer feedback played a significant role in the fleet's new-look cabin interior.

Seats are 3cm wider at the middle seat and 1cm wider on the aisle and window.

Other enhancements include around 25 per cent more overhead locker space, a new in-flight entertainment system with a larger 10-inch screen, high power USB charging points and Wi-Fi connectivity.

The first two A321neo planes will enter commercial service in mid-November.