UPDATE | Air New Zealand will fly its Boeing 787-9 aircraft to Adelaide year-round following a seasonal stint this summer.

With the Adelaide-Auckland Dreamliner flights originally slated to end on March 25 2018 – reverting to an all-economy Airbus A320 – that means Adelaide flyers can continue to book travel in business class and premium economy throughout the year.

AirNZ's Boeing 787 departs Adelaide at 11:40am on Wednesdays, Fridays and Sundays as flight NZ192, reaching Auckland at 6:30pm local time on the same calendar day.

Out of Auckland, NZ191 is wheels-up at 8:15am on Wednesdays, Fridays and Sundays ahead of a 10:45am touchdown in Adelaide.

However, the airline's all-economy Airbus A320 jet will continue appearing in Adelaide's skies during peak periods throughout 2018 to provide up to two additional flights per week, departing both cities on Mondays and Tuesdays.

Those flights will be NZ791 out of Auckland and NZ792 from Adelaide, so passengers hoping to fly on the Dreamliner should seek out the Boeing 787 flights above instead.

PREVIOUS, March 15 2017 | Air New Zealand will begin flying its Boeing 787-9 between Adelaide and Auckland from 26 October 2017.

The Dreamliner will fly three days a week – on Wednesday, Friday and Sunday – as NZ191/192.

Air New Zealand

NZ192 departs Adelaide at 11.55am to reach Auckland at 6.25pm, with NZ191 wheels-up from Auckland at 8.35am and arriving into Adelaide at 10.40am.

During the peak season from 16 December 2017 to 27 January 2018 this will be supplemented by a less glamorous Airbus A320, following roughly the same timetable as the Boeing 787-9 but on Monday, Tuesday and Saturday as flights NZ791/792.

Of course, if your schedule allows it makes far more sense to fly on the Dreamliner.

You not only get a quiet, modern jet with clever tech to combat inflight fatigue – welcome even on this relatively short 4-5 hour jaunt – but the Boeing 787-9 sports both business class (below) and premium economy seats, unlike the all-economy layout of the Airbus A320.

In related news, Air New Zealand expects to cut the ribbon on its all-new lounge at Melbourne Airport's international terminal by May, which will cheer the mood of travellers who've been putting up with the temporary lounge since late last year.

The lounge will complete the airline's trans-Tasman lounge network, which has seen swish business class lounges open in Sydney, Brisbane and Auckland, and will share the same modern design as its siblings.

Once open, the Melbourne lounge will see a trio of premium lounges on Australia's east coast bookending the popular trans-Tasman corridor to Auckland, which attracts more traffic than any other international route.