Abstract: A route search system includes: a center server configured to perform a route search using preset transportation; a weather server configured to output weather information to the center server; and a terminal device configured to output, to the center server, a route search request including at least a scheduled departure time, an origin, and a destination. The center server is configured to: acquire the weather information along a route from the origin to the destination from the weather server in a case where the route search request is acquired from the terminal device; perform the route search in consideration of weather along the route included in the weather information; and output, to the terminal device, a route search result including at least the scheduled departure time, the origin, the destination, transportation used along the route, a boarding point of the transportation, and an exit point of the transportation.