Sims said net profit was likely to be lower in the current financial year.
To combat growing congestion, Airways expects to raise its capital expenditure in the year ahead to around $40 million, having increased it 10 percent in the last financial year, much of it spent on investment at Queenstown airport to allow evening flights into the alpine resort town.
"We are working very closely with several airports, particularly Auckland, to maximise the use of the single runway ahead of potential for further development", with an emphasis on data-sharing between airports to minimise congestion, Sims said.
New Zealand continued to measure its flight delays in seconds, whereas most countries measured routinely measured delays in minutes, he said.
Airways' 'commercial businesses' unit, which includes the development and delivery of air traffic controller training in New Zealand and internationally, increased net earnings to $3.5 million from $2.2 million, with Sims seeking a growing contribution to Airways' total earnings from such non-traditional services.
An announcement was "imminent" on a "very significant" sale in the US of its SureSelect pre-screening and pre-selection tool for air traffic controller training, said Sims.
Airways was also moving into air traffic controller training technology that could be delivered by apps on smartphones and tablets.