In the long run, it is dependent upon your travel itinerary as you could check out the jungle right before or just after your tours in Cusco. From Lima to Iquitos you should have more flights out there and doubtless also much less expensive types than from Cusco to Iquitos. https://zanderjlnmm.activoblog.com/26669312/facts-about-peru-amazon-river-tours-revealed