How prices of internet services (e.g. flight tickets, train tickets, hotel reservations) evolve over time? Is it better booking long ahead, or better booking just before? We captured prices twice a week during three months for a sample of cases to analyse the price evolution. In this fifth and last post, we summarize the analysis for flight tickets, train tickets and hotel reservations; there is no common trend (especially, not more expensive or cheaper over time), however, there are big differences (between 8% and 62%) in the 3 months before the actual reservation date. Next post in a week…