Starting in Hanoi, travel south through Vietnam by combining trains, domestic flights, and buses. Visit Ninh Binh and Ha Long Bay, then continue to Hue, Da Nang, Hoi An, and Ho Chi Minh City. For longer distances, flights save time, while trains offer scenic views and comfortable overnight journeys.https://vietnamtourist.com/trip/north-to-south-vietnam-highlights-tour-in-7-days-from-hanoi/