There's close, and there's really close! 220 meters = 722 feet A330-200 dimensions: Wingspan: 197 feet Length: 193 feet Yahoo News AU: Qantas planes come close over Adelaide (Sept 21 2013) The Airbus A330 aircraft flew within 220 metres of each other yesterday and were seconds from a crash yesterday afternoon. The planes received warning they were flying too close and re-established the required distance.
News.com.au: Qantas pilots praised for averting mid-air crash over Adelaide following air-traffic control blunder (Sept 21 2013) A mid-air disaster was avoided by seconds over Adelaide yesterday when two Qantas pilots ignored traffic-control directions that put them on a collision path. The passenger jets came within about 200m of a mid-air disaster just 19km west of the city about lunch time. The planes flew into the recognised danger zone in clear skies over Gulf St Vincent after a traffic-control blunder resulted in one plane being given permission to fly directly towards the other. The pilots reacted to on-board warning systems and changed the positions to avert a mid-air catastrophe. The traffic controller in question was last night stood down, pending the result of a full investigation.
Good video report here (but no video of the actual near-collision): http://video.cairns.com.au/v/134345/Qantas-planes-come-close-over-Adelaide