We have not even begun to scratch the surface as far as the domestic travel market is concerned. Recent surveys, and anecdotal evidence indicates that still over half the population of the major capital cities have never even been on a plane.
WEith the traditional once a year traveller starting to travel at ever increasing frequencies, and the increasing numkber of first timers( and subsequent repeat trips), I think the ultimate size of the market is somewhere in the 4 to 8 times the size of the current numbers.