In the long run, it is dependent upon your vacation itinerary as you may take a look at the jungle right before or just after your tours in Cusco. From Lima to Iquitos you should have extra flights available and doubtless also more affordable kinds than from Cusco to Iquitos. https://peru-amazon-tours-puerto49371.bloggactivo.com/26492925/details-fiction-and-peru-amazon-rainforest-tours