Sydney Metro Western Sydney Airport has been given the go ahead for a 2026 opening alongside the airport after the Federal Government committed $1.75 billion alongside an initial $3.5 billion in State funding for the new line. The jointly funded project will cost $11 billion and will connect the new Western Sydney Airport to the existing rail network at St Marys.

The line will consist of six stations. A station at St Marys will allow for seamless connections to the Sydney Trains network. Stations at Orchard Hills and Luddenhma will allow for new town centres and urban development. Stations at the new International Business Park and Aerotropolis will service the new major commercial centres in the region, whilst a station will also be located at the airport itself.
The line will now enter the detailed planning stage, ahead of construction beginning in 2021. The line is expected to open alongside the airport in 2026.