One of Air New Zealand's largest clients, the University of Otago, may choose to fly with another carrier following the airline's decision to suspend transtasman flights from Dunedin.

Air NZ last month announced it would suspend its Dunedin to Sydney service from April 16 to October 24, a move that has upset the university.

"It is disappointing the flights to Sydney were suspended," University of Otago chief operating officer John Patrick said.

The university had a preferred supplier agreement with Air NZ but would consider flying with a different airline if it offered a transtasman service from the city, he said....