From looking at the opal retailer site both the Domestic & International airports in Sydney have an opal card retailer. If you want to have a look yourself search 'Mascot' (airport suburb) on this site then look at the ones around the terminals; http://www.retailers.opal.com.au. Otherwise I'm sure you can ask someone when you get there.
Hope that helps!
Pearse - World Nomads over 3 years ago
How do you guys pronounce "can't"? Is it more like the American one or rather like the British one? over 3 years agoAnswered by Guillaume via WorldNomads.com