Originally Posted by
Alsacienne
Madrid to Venice ........ but you will probably spend the day travelling ... I doubt if there are direct flights so you'd have to transit via a third airport.
Iberia, Air Europa, MyAir, Vueling, Spanair and Air Pullmantur fly this route

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Everything you said I agree with. 5 days to see all that is not feasible. The OP will spend at least 2 days out of the 5 getting to different places.