Singapore Airlines was talking to Wellington Airport about suitability of either aircraft. The runway in the capital has limitations because of its length.
Turcotte would not discuss passenger loads on the route over the last year but said his airline was pleased with the performance of the service.
"In the first year of operation we did have some learnings. Once you start operating a route you learn where passengers really want to go," he said.
The airline had done some tweaking of schedules.
The Auckland-Singapore route started 41 years ago took some time to build up to the twice daily service it is now.
Turcotte said Wellington and the surrounding region had been supportive of the service.
"We have been very humbled by how Wellingtonians and people from the surrounding region have embraced and used the service over the first 12 months,'' he said.
Wellington Airport chief executive Steve Sanderson said Asian visitor spend was $147m for the Wellington region, up 16 per cent over the previous year while the rest of New Zealand was flat.
"Central New Zealand regions have also benefited since Singapore Airlines commenced their service with an 11 per cent increase in Asia visitor tourism spend."
Today Singapore Airlines has announced specials with flights from $154 one-way to Canberra and $997 return to Singapore.
Passengers connecting onwards from Singapore to any Singapore Airlines, SilkAir and
Scoot flight, can also buy stopover packages that includes accommodation, transfers and access to 19 local attractions from as little as $1.