Almost every first Vietnam trip runs the length of the country in one direction, and most people pick that direction by instinct. It is worth a few minutes of thought instead, because three separate forces pull on the answer and they do not always pull the same way.
The short version
North to south — Hanoi first, Ho Chi Minh City last — is the more common choice and the one that suits most American itineraries. South to north works better if the nonstop from the West Coast is what makes your trip affordable, or if you are travelling in a season that favours finishing in the north.
Neither is wrong. What makes the decision real is that it is effectively locked the moment you buy your international tickets, which is usually before you have finished planning anything else.
Why most people go north first
Hanoi is the harder city, and arriving there with fresh energy rather than two weeks of travel fatigue tends to work better. The north also carries the trip's most weather-sensitive items — Ha Long Bay, Sapa — so doing them early leaves room to adjust if conditions are poor. And finishing in Ho Chi Minh City means ending somewhere with the widest choice of onward flights.
The spine, in the usual direction: Hanoi → Hue → Hoi An → Nha Trang → Ho Chi Minh City. (Enable JavaScript for the interactive map.)
What your flights decide for you
There is no nonstop from the United States to Hanoi. The only nonstop route is Vietnam Airlines from San Francisco to Ho Chi Minh City, which means a West Coast traveller who wants to avoid a connection is starting in the south whether they intended to or not.
If you are connecting anyway — which anyone flying from the East Coast or the Midwest will be — the direction is genuinely open. Open-jaw tickets into one city and out of the other are widely available and usually cost little more than a return, so there is rarely a price penalty for not backtracking.
Da Nang as a third door
If your trip is centred on Hoi An, Hue and the central beaches rather than the whole country, flying in and out of Da Nang removes the direction question entirely. It has a reasonable set of connections through the Asian hubs and sits in the middle, which turns a country-length march into a regional trip with far less transit.
Backtracking is the thing to avoid
Flying into and out of the same city on a country-length trip means either a long internal flight at the end or a rushed return up the spine. An open-jaw booking removes that entirely, and it is the single most useful thing to get right early.
What the season decides
The regions do not share a calendar, so a long trip will sit in more than one weather window whichever way it runs. An autumn trip meets the central coast's storm season at some point in either direction, so the useful response is slack around the central leg rather than a particular direction. A trip in the northern winter faces cool, grey, drizzly weather in Hanoi and Sapa, which some people would rather take at the start while they are fresh and others would rather skip entirely.
March and April are forgiving in every region, which is one reason they make the direction question much less consequential. Outside that window the season has an opinion.
What jet lag decides
Arriving from the US East Coast means landing twelve hours out of step during Eastern Standard Time and eleven during Eastern Daylight Time, after a journey that commonly runs twenty-two to twenty-six hours door to door. Whatever city you land in, the first day is largely a write-off.
That argues for starting somewhere you are happy to spend a slow day. Hanoi's Old Quarter absorbs a jet-lagged wander well. Ho Chi Minh City is hotter and harder going in that state. It is a modest consideration, but it is the one most people ignore entirely and then regret on day two.
What the two ends are actually like
They are different cities in temperament, not just geography. Hanoi is older, denser and cooler in winter, with a street plan that rewards walking and a food culture built on a handful of dishes done exactly. Ho Chi Minh City is bigger, hotter, flatter and more commercial, with wider boulevards, better nightlife and the country's most significant war museums.
Ending in Ho Chi Minh City means finishing on the easier city with the most flights out. Ending in Hanoi means finishing on the one most people find more atmospheric. Neither is a strong argument on its own, but if the other three factors cancel out, this is a reasonable tiebreaker.
What this actually settles
Look at what has just happened. Direction feels like the first creative decision of the trip, and it is mostly not a decision at all — it is the residue of things settled elsewhere. Which airports you can reach is set by the airline map. Which month you travel is usually set by work. Whether an open-jaw ticket is available at a sensible price is set by the fare market on the week you look.
By the time anyone asks themselves which way to go, those three have normally answered it. The useful move is to notice that earlier, and treat the international booking as the moment the route is chosen rather than a separate errand. Which commitments quietly foreclose which others is the subject of Vietnam, End to End.
FAQ
Should you travel Vietnam north to south or south to north?
North to south — Hanoi first, Ho Chi Minh City last — is the more common choice and the one that suits most American itineraries. South to north works better if the nonstop from the West Coast is what makes your trip affordable, or if you are travelling in a season that favours finishing in the north.
How do US flights decide your direction?
There is no nonstop from the United States to Hanoi. The only nonstop route is Vietnam Airlines from San Francisco to Ho Chi Minh City, which means a West Coast traveller who wants to avoid a connection is starting in the south whether they intended to or not.
How does the season affect which way you travel?
The regions do not share a calendar, so a long trip will sit in more than one weather window whichever way it runs. An autumn trip meets the central coast's storm season at some point in either direction, so the useful response is slack around the central leg rather than a particular direction. A trip in the northern winter faces…