To find the return flight distance between Lisbon to Porto via Castelo de Vide, Belmonte, Tomar, Coimbra, start with entering the locations in the control and click on Return Flight Distance. You can also add multiple destinations in between while returning from a location. If you are not aware of the routes, you can check the
Lisbon to Castelo de Vide Route via Castelo de Vide, Belmonte, Tomar, Coimbra.