Route brief · SFO → HAN
San Francisco → Hanoi
$417
−48% vs typical
seasonal median $795 · difference $378
Sep 9 – Oct 6 · 27 nights
Korean Air1 stop
- Usual monthly lows
- $437–$793
- Board rank
- Stronger than 95%
- Route sample
- 4 observed months
Cached fare — the booking search re-prices live before you pay.
Destination briefHANHanoiOld-quarter alleys, motorbike tides and the country’s best food — and Ha Long Bay two hours out.Best windowOct–Nov · Mar–AprAirportsNoi Bai (HAN)All routes into HanoiWhen this route gets cheap.
Cached-fare history: across 4 months, Sep is the cheapest for SF → HAN. Best time to be there: Oct–Nov · Mar–Apr.
Fares bottom out in September around $417 and peak in December near $1,092 — a $675 spread across the 4 months we track. The cheapest itinerary we are tracking makes one stop and takes about 17 hours outbound, on a 27-night trip — ticketed under Korean Air, which on a connecting fare need not operate every leg. At $417 for 11,759 km each way, that works out to about $18 per 1,000 km flown. That is well under the $40 that ultra-long-haul fares on this board typically run. Of the 18 departure cities we track at a similar distance from Hanoi, this is the cheapest right now — 11% under the next one, Milan. That puts it in the cheaper half of the 51 routes of similar length we watch out of San Francisco, where the middle fare is $816.
The 7 days we hold a cached fare for
Tap a date → live search
The median cached fare across this calendar is 156% higher than when tracking began on Aug 17 — $427 then versus $1,092 now, across 4 recorded snapshots. This is a calendar-level trend, so an individual deal above can be lower. The lowest single day we have seen here is $417, on Sep 21.
- Wed, Sep 9$417
- Fri, Oct 2$437
- Sat, Nov 21$793
- Mon, Dec 14$1,092
- Tue, Dec 15$1,371
- Wed, Dec 16$1,561
- Thu, Dec 17$1,688
These are the only days we have a cached price for on this route so far — not the only days it flies. The search above covers any date.
Cheapest in Sep · around $417
48% below the $795 typical fare
Cheapest round-trip fare found per month · San Francisco → Hanoi · cached-price history
Route facts
- Airports
- SFO · Oakland (OAK) · San José (SJC) ↔ Noi Bai (HAN)
- Flight time
- ~17 hours outbound
- Distance
- ~11,759 km each way
- Typical price
- $795 round-trip (seasonal median)
- Airlines on the board
- Korean Air
- Itineraries
- Connections on current fares
- Best months to visit
- Oct–Nov · Mar–Apr
SF → HAN, answered.
Is $417 a good price for San Francisco to Hanoi?
Yes — the seasonal median for this route is around $795 round-trip. At $417 you're 48% below that, saving about $378, which we rate rare for this route.
What is the cheapest month to fly from San Francisco to Hanoi?
Across 4 months of cached-fare history, Sep comes out cheapest on this route. The best months to actually be in Hanoi are Oct–Nov · Mar–Apr — when those overlap, that's your window.
How far in advance should I book SF → Hanoi?
We do not publish a number for this, because we cannot measure it yet. Answering it honestly means watching the same departure date on this route over many weeks as it approaches, and that archive is still filling up — so any "book N days ahead" figure here would be borrowed from somewhere else rather than measured. What we can measure is which month is cheap: across 4 months of cached fares, Sep comes out lowest on this route. See /guides/what-moves-a-flight-price/ for what does move a fare.
Are there nonstop flights from San Francisco to Hanoi?
The current cheapest fares involve a connection, ticketed under Korean Air. Nonstop options exist on many dates at higher prices — check the live search for your exact dates.
Are these prices guaranteed?
No — these are cached fares found on real searches (this one on September 1). Airlines reprice constantly, so the booking search re-checks the live price before you pay. Fresher finds are far more likely to still be available.
Next step
Sleeping in Hanoi?
Lock the flight first — then compare stays for Sep 9 – Oct 6 · 27 nights.
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Missed it?
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