Why visit just Paris when you can see London, Paris, and Amsterdam in one trip? Multi-city travel maximizes the value of your long-haul flight. However, it introduces logistical complexity. Here is how to tame the chaos.
Humans aren't great at solving the "Traveling Salesman Problem" (finding the most efficient route between multiple points). AI is.
Use NxVoy's Multi-City Planner to input "I want to visit London, Paris, and Rome in 10 days". It will tell you the best order to visit them to save money and time.