For mission creators out there, I've compiled a list of the airport IDs for the landAt command.
Only major issues I've noticed, is that when I try to land at Sydney, with the plane starting at the very North-Western corner of the map, the plane will fly in circles near Sydney, until the game evntually crashes. Also, a couple of the airfields have trees too close to them, causing larger aircraft, such as the C-17 and AC-130 to crash before reaching the strip.
this landAt 0; - Melbourne
this landAt 1; - Sydney
this landAt 2; - Adelaide
this landAt 3; - Brisbane
this landAt 4; - Darwin
this landAt 5; - Alice Springs
this landAt 6; - Perth
All of the testing was done in 2.0. Will check 3.0 for any fixes.
EDIT: None of the issues I was having are fixed in 3.0