Phong Nha Ke Bang National Park can be reached easily from Dong Hoi city which is 50 km away. Taxi, Bus or motorbike taxis are available. Dong Hoi city can be reached through bus, train or flight.
Vietnam Airlines VietJet Air, Jetstar Pacific Airlines, Vietnam Airservice are some airlines which fly to Dong Hoi. There are flights available from all major cities in Vietnam like Hanoi and Ho Chi Minh City to Dong Hoi city. Indirect flights from international cities like Seoul, Bangkok, Singapore are also available.
Cabs/Cars are easily available from any city in Vietnam. If you're coming to Dong Hoi city via bus, train or flight, cabs can be booked for Phong Nha from private taxi service providers. The most favourable route is via Hoan Lao.
Railway connectivity with major cities of Vietnam is good from Dong Hoi. Hue is a few hours from Dong Hoi. Trains to as far as Ho Chi Minh City and Hanoi are available.
Buses travel upto Phong Nha Ke Bang National Park and not just till Dong Hoi City. Direct buses from Hue, Hanoi, Danang, Ninh, Binh and other small and large destinations are easily available. Bus service between Dong Hoi city and Phong Nha via Hoan Lao is quite active throughout the day.
Moving around inside the National Park can be very physically taxing at times. One can move on foot for small distances or small caves, but there are some large caves expanding up to several kilometres for which walking can be a bad decision. Expedition of caves on boats can be arranged here since a large number of caves have water flooding inside them. Boats cost around 360,000 VND for up to 14 people to visit one and 400,000 VND for two caves.