Large modern airports tend to be at the end of the line, because few cities have the space to build them anywhere near the center anymore. Then again, Sydney i

Large modern airports tend to be at the end of the line, because few cities have the space to build them anywhere near the center anymore. Then again, Sydney is 15 min from the city center and has two stops, one each for the international and domestic terminals, on a line that continues far into the burbs.