Nearing the end of our Sydney stay, we sent one of the girls back to Perth before our departure to Singapore. As her flight is at 5am in the early hours we travelled by the City Circle also known as the Airport Link to the airport. The Airport line is an underground line linking the airport to the city. The railway line connecting Sydney Airport to the Central Business District and the south-western suburbs in Sydney.
The City Circle built between the airport's International and Domestic Terminals, allowed services to make a continuous run through the city and return to the suburbs without having to terminate.
All suburban passenger trains in Sydney are double-deck electric multiple units with spacious seatings and ample leg room