Horror Tunnel Crash Near Sydney Airport Kills One, Causes Traffic Chaos

A young woman has died in a head-on crash in a tunnel near Sydney Airport, while three others have been taken to hospital in a serious condition.

The crash happened in the airport tunnel on General Holmes Drive before 5.40am on Thursday, NSW Police said.

The female victim is believed to have been a passenger in the city-bound vehicle.

The southbound lane of the airport tunnel has now been reopened, but long delays are still expected and drivers are being told to allow extra time.

Earlier, traffic had been queued up for at least 7km, with officials advising airport travellers to take public transport to the airport instead of driving.