Air New Zealand says it will defer aircraft deliveries, slow capacity growth and undertake a cost-cutting exercise in response to softer market conditions.
Singapore Airlines says it will use its Airbus A350-900 on all four of its daily flights to Brisbane from the start of May.
Cathay Pacific will add a low-cost carrier (LCC) to its business after agreeing to buy HK Express from HNA Aviation Group for HK$4.93 billion.
Qantas has retrained its pilots for some stall recovery techniques following a "stick shaker" incident in 2017, the ATSB says.
Qantas chief executive Alan Joyce says the first year of Boeing 787-9 Perth-London nonstop flights has proven the concept of a Western hub.
Airlines for Australia and New Zealand has expressed a "profound sense of disappointment" with the Productivity Commission's airports inquiry.