Released in 1990, it contains an airport building with control tower, a helicopter, an airplane, a runway, a baggage cart and eight minifigs, including pilots for the plane and the helicopter and a policeman. (from LEGO wikia)
You can download the model here in LDraw format. You will need the custom bricks download here. (these are not official LDraw stickers).
New: 3d online building instructions (experimental)
The airport at dawn:
Airport building from behind - notice the schedule board, the locks with numbers and the security gate:
Control center:
View inside the plane (there is only one row of seats.. seems more comfortable to me than normal):
Airplane in the sky (it can't pull the gears in though):
Another night view from above:
EN: 6396 International Jetport
DE: 6396 Insel-Flughafen
NL: 6396 Luchthaven