Great1 stop · 14h
SEL to ISTTürkiye
Istanbul
$390
usually $640
−39%
Most monthly lows $515–$679. Cheaper than every other month on record (8).
Flights · SEL → HAN
Seoul to Hanoi
Best fare, round trip
$225
−18%
below its usual $275
you keep $50
Found
- Depart
- Sat 24 Oct
- Return
- Fri 30 Oct
- Stay
- 6 nights
- Flight
- Nonstop · 5h
- Airline
Jeju Air
Most of this route’s monthly lows fall between $225 and $285. The drop beats 50% of measured fares on the board, over 6 observed months.
Cached fare — the booking search re-prices live before you pay.
VietnamHanoiOld-quarter alleys, motorbike tides and the country’s best food — and Ha Long Bay two hours out.Best windowOct–Nov · Mar–AprAirportsNoi Bai (HAN)Every route into HanoiFare seasonality
When this route gets cheap.
Fares bottom out in October around $176 and peak in February near $408, 132% dearer, across the 6 months we track. The cheapest itinerary we are tracking flies Jeju Air nonstop and takes about 5 hours outbound, on a 6-night trip. At $225 for 2,742 km each way, that works out to about $41 per 1,000 km flown. That is about the $43 per 1,000 km typical of medium-haul fares here. Across the 4 departure cities we track at a similar distance from Hanoi, this fare ranks 2nd — 3% above the $218 from Singapore. The best time to be in Hanoi: Oct–Nov · Mar–Apr.
Day-level prices for the next 4 months
Press a day to compare its fares
The median cached fare across this calendar is 21% higher than when tracking began on 8 Aug — $208 then versus $252 now, across 20 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 $127, on 9 Sep.
Cached day-level data for this route is sparse — 17 of 109 days priced, from 103 tracked fares. The days below are shown as found, with no cheapest-day or below-median call.
October 2026
November 2026
Sunday 1 November: $227. Compare fares from this day.23Wednesday 4 November: $261. Compare fares from this day.Thursday 5 November: $260. Compare fares from this day.678Monday 9 November: $258. Compare fares from this day.10Wednesday 11 November: $247. Compare fares from this day.12131415Monday 16 November: $254. Compare fares from this day.1718Thursday 19 November: $242. Compare fares from this day.20212223242526Friday 27 November: $236. Compare fares from this day.Saturday 28 November: $253. Compare fares from this day.2930
December 2026
1234567891011121314151617181920212223Thursday 24 December: $271. Compare fares from this day.25262728293031
January 2027
1234567891011Tuesday 12 January: $285. Compare fares from this day.13141516171819202122232425262728Friday 29 January: $344. Compare fares from this day.3031
Cached fares · checked 15 Oct 2026
Cheapest in Oct, around $176
36% below the $275 typical fare
$176Oct, the cheapest month. Compare October fares.$227Nov, below the usual price. Compare November fares.$225Dec, below the usual price. Compare December fares.$285Jan ’27, around the usual price. Compare January fares.$408Feb, above the usual price. Compare February fares.$275Mar, around the usual price. Compare March fares.
CheapestBelow usualUsualAbove usualPress a month to compare its fares
Cheapest round-trip fare found each month, Seoul to Hanoi, from cached prices.
Route facts
- Airports
- Incheon (ICN) · Gimpo (GMP) ↔ Noi Bai (HAN)
- Flight time
- ≈5 hours outbound
- Distance
- ≈2,742 km each way
- Typical price
- $275 round-trip (seasonal median)
- Airlines on the board
- Jeju Air
- Itineraries
- Nonstop available
- Best months to visit
- Oct–Nov · Mar–Apr
Good to know
SEL → HAN, answered.
Is $225 a good price for Seoul to Hanoi?
Only slightly. The seasonal median is around $275 round-trip and this fare is 18% under it. We do not call a drop notable until 20%, so this is an ordinary price for the route rather than a reason to hurry.
What is the cheapest month to fly from Seoul to Hanoi?
Across 6 months of cached-fare history, Oct 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 SEL → 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 6 months of cached fares, Oct comes out lowest on this route. Our guide Why flight prices change covers what does move a fare.
Are there nonstop flights from Seoul to Hanoi?
Yes — the current board includes nonstop fares (Jeju Air). The outbound leg runs around 5 hours.
Are these prices guaranteed?
No — these are cached fares found on real searches (this one on 17 October). 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 24–30 Oct · 6 nights.
Browse hotelsMissed it?
Cached fares expire. This route has a feed of its own — follow it and the next SEL → HAN drop reaches you as soon as we find it.
Follow this route’s feedKeep browsing
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