Cheapest€11.88
- Korea Railroad KR985206:4340m07:23Osong StationOsan station
Door to door 1h 24mCO2 2.5 kgChanges 0Refundable
Sejong to Osan train
Trains from Sejong to Osan start at €11.89 and take 1h 24m at their fastest.
The Trains from Sejong to Osan starts at €11.89 and takes 1h 24m door to door, run by 2 operators over 75 km, with around 6 departures a day. Fares bottom out about 90 days before departure.
- 1h 24mDoor to door
- 40mMoving
- €11.89From
- 2.5 kgCO2
The cheapest and the fastest on September 27, 2026
Two journeys we can sell today, with the service number each operator files them under.
Rail operators
Speed, flexibility and what is on board. Nothing here is a rating, because we have not earned one.
That is the traveling done. What happens after you walk out into Osan is not something we sell.
A room in Osan for the night the train gets in
Hotels and apartments near downtown, most of them with free cancellation, on a map that shows what is walkable.
Search Osan on Trip.comOr compare on Booking.com
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When to book Sejong to Osan
The same search run across the whole booking window, so the shape of the curve is visible rather than described.
- €11.8890 days
- €11.8860 days
- €11.8845 days
- €12.4430 days
- €12.4421 days
- €17.9414 days
- €20.697 days
- €19.043 days
- €23.441 days
- Cheapest lead time
- Fares bottom out around 90 days ahead, at €11.88.
- How much it moves
- The gap between the cheapest and most expensive lead time is 97 percent. The most expensive point is €23.44, 1 days out.
- What that means
- Today sits inside the cheap window, which closes about 90 days before departure. Waiting from here has usually cost money on this corridor rather than saved it.
Which departure day costs least
Median cheapest fare for each weekday, taken across the next three weeks of real prices.
- €14.09Sun
- €11.89Mon
- €15.19Tue
- €12.44Wed
- €17.94Thu
- €14.64Fri
- €17.39Sat
Where you leave from and where you arrive
The stations, airports and ports each mode on this corridor actually uses.
Sejong
Rail
- Osong Station
- Bugang Station
- Naepan Station
What the journey actually looks like
Direct or connecting, how far the route really runs, and what happens when a connection is missed.
- Direct or connecting
- 33% of the services we sell on this corridor run through without a change. The remaining 67% involve one connection.
- How far it really runs
- The route covers 75 km against 65 km in a straight line, a detour of 15 percent. Track and road geometry account for the difference.
- Where the change is
- Connections are made at Buyeo, Hanam, Gwangmyeong, Pubal. The gap between arriving and leaving is 51 minutes, of which about 5 is walking.
- If the connection is missed
- The tightest connection we sell here has a 18 percent chance of not being made on the timetable alone. Both legs are sold on one booking, so a missed connection is ours to fix and you are rebooked at no charge.
- First and last departure
- The first service of the day leaves Sejong at 06:12 and the last at 07:30, across 6 departures. The return direction keeps its own timetable, so the times back are not these times reversed.
Questions about Sejong to Osan
The questions people actually ask about this trip, answered from the same prices and times the page above is built on rather than written once and left to go stale.
How long does the Train from Sejong to Osan take?
The Train from Sejong to Osan takes 1h 24m door to door, of which 40m is spent moving. The route runs 75 km. The difference between the two times is reaching the terminal and leaving it at the far end, which every time on this page includes.
How much does the Train from Sejong to Osan cost?
The Train from Sejong to Osan starts at €11.89 for one passenger, checked on September 27, 2026. A typical fare is €29.21. Both are the total including taxes, supplier fees and our service fee, so the price here is the price at checkout.
Who runs the Train from Sejong to Osan?
2 operators run the Train from Sejong to Osan: Korea Railroad, SR Corporation. Between them they file around 6 departures a day. The operator table on this page compares them on fare, journey time, cruising speed, fare conditions and what is provided on board.
Which terminal does the Train from Sejong to Osan use?
The Train from Sejong to Osan leaves from Osong Station and arrives at Osan station. Allow about 44m for reaching the departure terminal and leaving the arrival one. That time is already inside every door to door figure quoted on this page.
When should I book the Train from Sejong to Osan?
Fares for the Train from Sejong to Osan bottom out around 90 days ahead, at €11.88. The gap between the cheapest and most expensive lead time across the window is 97 percent, measured on September 27, 2026. Booking inside the final week has consistently cost more.
How much CO2 does the Train from Sejong to Osan produce?
The Train from Sejong to Osan produces about 2.5 kg of CO2 per passenger over 75 km, which works out at roughly 33 grams per passenger kilometer. That figure is for the whole journey and for one traveler, not for the vehicle.
What is provided on board the Train from Sejong to Osan?
Operators on the Train from Sejong to Osan publish Power outlets, Wi-Fi. That is what 2 carriers on this corridor state about their own fleets, across a journey of 1h 24m door to door. Where a carrier publishes nothing, this page lists nothing for it.
Where these numbers come from
Derived from service area No carrier record names this exact pair. The operators listed publish a service area covering both places at a distance their mode plausibly carries people, which is evidence that the corridor is served and not evidence of a specific service. Pages state which, because presenting the two as the same thing would be dishonest.
Schedules, seat counts and fares are generated by our own model until the supplier contracts are signed. Places, coordinates, operators, which operator serves which pair, and every distance are real. We would rather say that on every page than let a modeled number pass for a filed one.
Defined in full at Door to door, Fares, The booking window, Carbon
- On this page
- Every figure above was computed for Sejong to Osan on September 10, 2026: 75 km of route against 65 km in a straight line, 6 services a day, 2 operators, a cheapest fare of €11.89, and 1h 24m door to door on the fastest mode. The return direction is computed separately and its numbers are not these numbers.
Related journeys
Osan to Sejong trainCompare every mode from Sejong to OsanAsan to Osan trainBuyeo to Osan trainCheongju-si to Osan trainChinch'ŏn to Osan trainDaejeon to Osan trainGongju to Osan trainGwangmyeong to Osan trainHanam to Osan trainIksan to Osan trainJeonju to Osan trainNonsan to Osan trainAsan to Osan train
The trip is the easy half to plan. The days in Osan are the half people leave until last.
Day trips out of Osan and across South Korea
Day trips that leave Osan in the morning and cover a good part of South Korea by evening.
See Osan on KlookOr browse GetYourGuide
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