Regional rival Air New Zealand Ltd (AIR.NZ) also reported a swing to profit in the first half ended Dec. 31 on Thursday, along with a muted outlook.
Qantas Chief Executive Alan Joyce said cost of living pressures would hit discretionary spending "at some point" but so far the airline expected robust demand into mid-2024 at least.
Qantas said it was facing delays of up to six months in new aircraft deliveries from Airbus SE (AIR.PA) alongside other airlines around the world.
The Australian carrier said it would bolster its fleet by acquiring some older Airbus planes and exercising nine options for A220 purchases to help meet travel demand growth.
"Outlook for RASK is to reduce, however off what we estimate were elevated levels," said Citi analysts in a client note.