Question Aeroport International Melbourne localisation ?

Airport West is not the Melbourne International aiport (whose name is Tullamarine).
there is no tram/train service running between the city and the international airport but the best way for you get to Spencer station from the airpot is to use the Skybus shuttles (http://www.Skybus.com.au), running between the airport and Spencer station, 24h/7days. Return ticket is only $24 !!

Finally, here is the link for the Tullamarine airport: http://www.melair.com.au/index.asp

Good luck
Fred