Jetstar passengers will have to get to the airport earlier as part of a series of changes by the airline.
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Check-in, bag drop and boarding gate closure times will be changed from May 23.
Jetstar chief operating officer Matt Franzi said the changes were in line with other low-cost airlines.
"We know our performance hasn't been up to scratch and we are working hard to boost punctuality and reliability," he said.
"To improve our performance, we're also recruiting more airport staff, cabin crew and engineering team members."
IN OTHER NEWS:
Check-in and bag drop will close 40 minutes before domestic flights, from 30 minutes previously.
International travellers will need to check-in and drop their bags at least 60 minutes before their flight and that is 15 minutes earlier than usual.
Jetstar boarding gates will close 20 minutes before departure for all flights - five minutes earlier.
"These new times will help prevent delays and help us get you to your destination as soon as possible," an email to passengers said.
The airline made the announcement on May 16 with news its seventh Airbus A321neo LR had arrived in Melbourne and would join the existing fleet in coming days.
According to Jetstar, these planes are quieter, more fuel efficient and have wider seats with USB power points.
