On the first Sunday, as a part of the Internatioanl Balloon Festival, Château-d'Oex will be organizing the traditional flight in honour of the twinned towns of Bristol (UK), Sint-Niklass (Belgium), Romorantin (Loire, France) and Château-d'Oex.
Linked by a symbolic ribbon bearing the four national flags, the four twinned balloons will take off together and try to keep their formation for as long as possible. The other balloons will fly behind them. The ties of friendship established between the four towns have grown with time, resulting in a marked increase in both tourist and political exchanges that have been beneficial to these different European regions. The synergy developed through international meetings enables the organisers to consolidate quality flights and competitions as regarding commercial and tourist matters.