Two additional Twin Otters were based in Thunder Bay and were operated by Bearskin Airlines crews but painted in full NorOntair colours.

In its final years, ONTC bought Air-Dale Ltd and operated all the remaining routes until the service was discontinued.

In 1996, the newly elected government of Premier Mike Harris moved to close down the airline by removing subsidies.

[vague][2] NorOntair was the first airline in the world to order and take delivery of Bombardier's de Havilland Canada Dash 8 Series 100,[3] on October 23, 1984, operated by Air-Dale Ltd.

It was number 6 from the assembly line and remained in active service until the closure of the company flying up to 14 hours a day across Northern Ontario.