OTTAWA — Airlines and other aircraft operators are in line for $150 million of fee reductions over two years from Nav Canada, which operates Canada’s air navigation system.

Ottawa-based Nav Canada says the cuts in the service charges, which are levied on airlines and other owners and operators of aircraft to recoup the costs of providing air navigation services, will begin Sept. 1.

Nav Canada says the reduced fees are possible because of strong growth in air traffic, investments in its air navigation system and cost controls.

It estimates that its customers will save about $100 million in the 2016-17 fiscal year, followed by another $50 in savings the next year.

Nav Canada provides air traffic control, flight information and other services for aircraft operating in Canada’s airspace.