The way points of this bicycle route:
This is the walking route from the airport to Wolli Creek railway station, saving $10 on the airport train. You can also take public bus 400 from here to Mascot station and avoid the $10 fare
walk away from departures, across the car park and you get to the edge of the car park. Turn right to go under the bridge at water's edge
now turn right up the ramp and go across the bridge along the footpath, over the water
keep following the path until it leads into the park, exiting right off the bridge
go right across the park
keep following the water
Cross the highway at the pedestrian crossing and head straight
you're almost there, even though it looks like new residential buildings and nothing else
turn right before the tracks (forced turn)
There you go. $10 for 1.5km, well done.