Abstract: A travel plan proposal system includes: a destination deriving unit configured to derive a predetermined number of destination areas from all destination areas on the basis of vacancy rates calculated for a plurality of accommodation facilities in the destination areas for each schedule pattern, and derive a candidate for the travel plan including a combination of the schedule pattern and the destination areas for the respective nights to stay; and a route deriving unit configured to set, for each candidate for the travel plan, a predetermined route for sequentially moving from a departure place to the respective destination areas and returning, and transportation means, and derive a candidate for the travel plan in which a total of representative accommodation costs of the destination areas in the candidate for the travel plan and a total of expenses required for the transportation means are within a budget.