Regions to know
To frame your trip by what you have time for and what you're after.
North (Hanoi, Halong, Sapa)
Hanoi, Halong Bay, Sapa, Ninh Binh, Ha Giang loop
Most flights from Europe and Asia land at Hanoi (HAN) or Saigon (SGN). The north has four real seasons — autumn (Oct–Nov) is the prettiest. Halong, Sapa, and Ninh Binh are all within 2–6 hours by bus or train from Hanoi.
Centre (Hoi An, Hue, Da Nang)
Hoi An, Hue, Da Nang, Phong Nha
The country's tightest tourist zone — Hoi An (lanterns + tailoring), Hue (imperial), Da Nang (beach + bridges + airport), Phong Nha (caves). Fly into Da Nang (DAD) for direct access. April–August is the dry window; September–November can flood.
South (Saigon, Mekong)
Ho Chi Minh City, Mekong Delta, Cu Chi tunnels, Vung Tau
Tropical year-round, with a May–September monsoon. Saigon (HCMC) as base. Day trips to Cu Chi tunnels (90 min north) and the Mekong Delta (1–3 days southwest). Cooler in the central highlands (Da Lat) 6 hours northeast.
Central highlands
Da Lat, Kontum, Pleiku, coffee plantations
Cooler, mountainous, the source of most of Vietnam's coffee. Da Lat is a French-built hill station with pine forests and waterfalls. Off the standard tourist circuit — best for a second trip or a slow extension.
Phu Quoc & islands
Phu Quoc, Con Dao, Nam Du
Phu Quoc is the biggest and easiest (direct flights, resorts, beaches). Con Dao is the off-the-radar one — former prison island, now a marine reserve. Best November–April; closed-feeling May–October.
Far north (Ha Giang loop)
Ha Giang, Dong Van karst plateau, Meo Vac
A 350km motorbike loop on the Chinese border — limestone karsts, Hmong markets, hairpin passes. Done in 3–5 days, usually with an Easy Rider (local biker who drives you). Cooler year-round, snow in winter. The Vietnam few tourists ever see.