The visit from Haugland achievement was a nice suprise when achieving it for the first time, but now it is nothing special anymore. It is still a pretty big achievement since I need 1000 points for it right now.
Maybe it is an idea to have a different type of plane for some bigger numbers (e.g. 500, 1000, 2000 etc.)
Like an A380 with a special livery, or a historic plane. Something more special than the standard green M plane that does not give much money (I rather use the runway time for an X plane).