On October 26, Australia switches on its first brand-new major airport in more than 50 years. Western Sydney International (Nancy-Bird Walton) Airport, built on 1,780 hectares at Badgerys Creek about 50km west of the city centre, opens with a selling point no amount of money could buy at the existing Sydney hub: no nighttime curfew.

That's the whole story, really. Sydney Kingsford Smith sits surrounded by houses and bans most flights between 11pm and 6am, which has squeezed airline schedules for decades. The new airport operates around the clock, letting carriers fly late at night and early morning for the first time. Singapore Airlines grabbed the symbolism immediately — its inaugural departure is set for 11:55pm, a slot that would be impossible at Kingsford Smith. Its pitch to passengers is simple: dinner in Sydney, breakfast in Singapore.

The project is often labelled a A$14 billion build, but the wider bill is closer to A$19 billion once you count the A$5.3 billion terminal, the A$11 billion Metro rail link and roughly A$4.4 billion of road upgrades. Critics have compared it to Montréal–Mirabel, the infamous mega-airport that flopped in the middle of nowhere. The counter-argument: Western Sydney is one of Australia's fastest-growing regions, and the airport was designed for the city of the 2060s, when it's projected to handle up to 82 million passengers a year. Opening capacity is a modest 10 million.

Airlines are voting with their fleets. Qantas and Jetstar will base up to 15 narrowbody aircraft there in year one — five Qantas, ten Jetstar — supporting more than 25,000 flights and around four million passengers. For Jetstar especially, late-night departures mean more flying hours per aircraft, which matters on thin margins.

Freight may prove the bigger prize. An A$805 million cargo precinct is finished, planners expect it to lift Sydney's total air cargo capacity by about a third, and Qantas Freight starts flying from the site in July 2026 — months before passengers do. Express delivery networks run on overnight flying, which the curfew at Kingsford Smith has long restricted.

For travellers, the practical impact depends on where you live. If you're in Sydney's east, the new airport is a trek, and rail connections have been criticised as late. But for the millions of people in Greater Western Sydney, an international gateway is now closer than the old one. Expect cheaper domestic fares as Jetstar grows, red-eye options on Asian routes, and a second set of slots in one of the Asia-Pacific's most congested markets. Whether you're flying out of it or not, competition at two Sydney airports should reshape pricing and schedules across the region.