finally I managed to book my flight to DebConf8.
2008-08-03 IB3537 07:45 / Munich, Franz Josef Strauss, Terminal 1 10:25 / Madrid, Barajas, Terminal 4 2008-08-03 IB6845 12:25 / Madrid, Barajas, Terminal 4S 19:40 / Buenos Aires, Pistarini, Terminal A 2008-08-25 IB6844 21:35 / Buenos Aires, Pistarini, Terminal A 14:30 day +1 / Madrid, Barajas, Terminal 4S 2008-08-26 IB3564 16:30 / Madrid, Barajas, Terminal 4 18:55 / Munich, Franz Josef Strauss, Terminal 1& I'm still surprised how frequently the prices for the same flights change ...