Do I need a SIM card?

Yes. Pick one up at the airport for about $10-$15 for 30 days of data. Viettel has the best coverage.

Vietnam is still a cash-heavy society. Carry Vietnamese Dong (VND) for street food and small markets, though hotels and larger restaurants accept cards.

Planning a Two-Week Trip Through Vietnam

Focus on the north-to-south route, starting in Hanoi and ending in Ho Chi Minh City, using a mix of internal flights and sleeper trains to save time. Dedicate at least 3 days to major hubs to avoid burnout and prioritize regional diversity over trying to see every city.

Map your route north-to-south. Start in Hanoi (North), move to Ninh Binh and Ha Long/Lan Ha Bay, travel to Hue and Hoi An (Central), and finish in Ho Chi Minh City/Mekong Delta (South). This route is the most logical path for transport connections.
Book internal flights for long distances. Vietnam is long. Save days by flying from Hanoi to Da Nang or Hue, and from Da Nang to Ho Chi Minh City. Use VietJet or Vietnam Airlines; flights usually cost between $40 and $80.
Reserve sleeper trains for regional travel. For mid-range distances, like Hanoi to Hue, use the Reunification Express. Book a 'soft sleeper' berth (4-berth cabin) at least two weeks in advance via the official Vietnam Railways website.
Secure your e-visa early. Apply for the Vietnam e-visa at least 15 days before your departure. It is a single or multiple-entry permit valid for up to 90 days.

Do I need a SIM card?: Yes. Pick one up at the airport for about $10-$15 for 30 days of data. Viettel has the best coverage.
Is cash necessary?: Vietnam is still a cash-heavy society. Carry Vietnamese Dong (VND) for street food and small markets, though hotels and larger restaurants accept cards.