 The first international route that passed through the territory of the Kingdom of SHS was opened by Compagnie Franco-Roumaine.In order to compete with the Orient Express train line, which was for a long time the fastest link between Western Europe and the Middle East, this company introduced world's first regular night flights on the Belgrade-Bucharest route.A three-engine Caudron C.61 took off from Bucharest at 4.00 am and landed in Pančevo at 9.00 am, on 9 September 1923.