<p>The Delay-Tolerant Networking (DTN) architecture has revolutionized the network world. The applications that one can imagine with, are various and multiple, which they are terrestrial or interplanetary. Today, most applications developed based on this new architecture are based on a dedicated implementation tools development. However, in these networks, where the links are intermittent and have a limited connectivity duration, routing protocols became more complex. For this reason, we are interested in the optimization of roads in a Delay-Tolerant Network, according to predictable approach. In this paper, we propose a new routing optimization strategy for DTNs, which consists to select the shortest path for that a message arrives at its destination in the shortest possible time. To the best of our knowledge, the proposed protocol is the first in which the transmission strategy takes into account the high connectivity duration of a link when deciding whether a node should forward a message or store it temporarily in a buffer until that a better link with high connectivity duration will be available. Simulation results demonstrate that the proposed protocol significantly improves the message transmission time in Delay Tolerant Networks, thereby optimizing the routing efficiency under different transfer periods. Finally, the proposed solution exhibits superior performance in terms of energy efficiency and overhead ratio compared to concurrent protocols.</p>