The most practical Seongsan Ilchulbong to Seoul route is Bus 111 from the entrance to Jeju International Airport, followed by a domestic flight to Gimpo. Using August 2026 published fares and the bus fare cap, it starts at ₩92,500 before Seoul local transit. Take a taxi only when its time flexibility is worth at least ₩42,000 more.
At a glance
- Bus 111 links Seongsan Ilchulbong Entrance with Jeju International Airport.
- A weekday Air Seoul regular fare plus the maximum bus fare totals ₩92,500 before Seoul transit.
- Gimpo Airport is the Seoul airport to plan around for this route; do not assume a Jeju-to-Incheon flight is available.
- There is no current official fixed door-to-door duration from Seongsan Ilchulbong to central Seoul.
The Seongsan Ilchulbong to Seoul route: why flying from Jeju Airport is the practical plan
Seongsan Ilchulbong is on Jeju’s eastern side, while Seoul is on the mainland. That makes the trip two connected journeys: an overland transfer to Jeju International Airport (CJU), then a domestic flight to Seoul’s Gimpo Airport (GMP).
Jeju Bus route 111 runs between Seongsanpo Passenger Terminal and Jeju International Airport and stops at Seongsan Ilchulbong Entrance. This removes the need to return to Jeju City before flying.
The route is strongest for travellers who already have a flight from Gimpo and can leave the attraction with enough airport buffer. A private taxi makes the same airport connection simpler, but its price changes the budget sharply.
Do not build an August 2026 itinerary around Jeju Air’s published Jeju-to-Incheon service. VISITKOREA recorded that direct service only through August 7, 2026, so that operating period had already ended by August 19.
Choose Bus 111 or a taxi for the airport transfer
The decision is about a known price gap. Bus 111 is the low-cost choice; a taxi is the choice for a tight connection, a difficult luggage situation, or a group that can divide the fare.
This table answers which transfer to Jeju Airport fits the departure plan.
| Transfer | Route | Cost (KRW, Aug 2026) | Choose it when |
|---|---|---|---|
| Bus 111 | Ilchulbong Entrance to CJU | 2,000–3,000 card | Flight has buffer |
| Bus 111, cash | Ilchulbong Entrance to CJU | 3,000 maximum | No transit card |
| Regular taxi | Seongsan-eup to CJU | 45,000 estimate | Time is more valuable |
| Deluxe taxi | Seongsan-eup to CJU | 81,000 estimate | Premium service required |
The Jeju Bus fare rules set an adult express-bus card boarding fare of ₩2,000, with distance charges capped at ₩3,000 beyond 40 km; cash payment uses the maximum fare. For a conservative budget, use ₩3,000 for Bus 111.
The Korea Airports Corporation taxi guide for Jeju Airport estimates a regular taxi between Jeju International Airport and Seongsan-eup at 100 minutes and ₩45,000, as of August 2026. That estimate is for Seongsan-eup, not a guarantee for a particular hotel or the Ilchulbong entrance.
The taxi premium over the maximum-fare bus is clear:
₩45,000 taxi − ₩3,000 bus = ₩42,000 extra
For two people, that is ₩21,000 each. For four people, it is ₩10,500 each before any difference between the exact pickup point and the published Seongsan-eup estimate. The bus remains the value choice unless preserving that time or reducing transfer risk matters more than the extra fare.
Compare Jeju-to-Gimpo flight fares before booking
A flight fare is the largest controllable part of the trip. Published standard fares differ by airline and by whether the departure falls Monday through Thursday or Friday through Sunday.
This table compares the published one-way Jeju-to-Seoul fares available in the supplied August 2026 airline tables.
| Airline and fare | Mon–Thu (KRW) | Fri–Sun (KRW) | Included charges |
|---|---|---|---|
| Air Seoul regular | 89,500 | 100,400 | Tax and fuel |
| Jeju Air standard | 90,500 | 105,500 | Tax and fuel |
| Jeju Air flexible/peak | 127,000 | 127,000 | Tax and fuel |
| Air Seoul flexible/peak | 127,500 | 127,500 | Tax and fuel |
Air Seoul’s published fare terms list regular one-way CJU–GMP totals of ₩89,500 on weekdays and ₩100,400 on weekends, including a ₩16,500 fuel surcharge and ₩4,000 tax. Jeju Air’s fare table effective for tickets issued from August 1, 2026 lists ₩90,500 Monday through Thursday, ₩105,500 Friday through Sunday, and ₩127,000 for its flexible or peak total, with the same ₩16,500 fuel surcharge and ₩4,000 airport tax.
The lowest published regular fare in this comparison is Air Seoul’s weekday amount. A flight’s actual availability, departure time, and sold fare still depend on the booking inventory. The price table is useful for setting a budget ceiling, not for assuming a specific seat remains on sale.
Worked cost example: the public-transfer plan versus taxi
The useful comparison is the total needed to get from the attraction to a Seoul transit gate, rather than the airfare alone. The example below uses the maximum Bus 111 fare, a weekday Air Seoul regular fare, and Seoul’s adult transit-card base fare.
As of August 2026, the Seoul Metropolitan Government subway fare page lists a ₩1,550 adult base fare with a transit card, effective June 28, 2025.
Weekday public-transfer example
Bus 111 maximum fare ₩3,000
+ Air Seoul weekday regular fare ₩89,500
+ Seoul subway base fare ₩1,550
= ₩94,050
A Jeju Air weekday standard flight changes the calculation to:
₩3,000 + ₩90,500 + ₩1,550 = ₩95,050
A Friday-to-Sunday Jeju Air standard example is:
₩3,000 + ₩105,500 + ₩1,550 = ₩110,050
The Seoul amount is a base fare, not a promise that every hotel costs ₩1,550 to reach. Longer rail journeys add distance-based charges, and the final destination can require a different local connection. The airfare and Jeju airport transfer are the figures that make the largest difference.
A regular-taxi weekday version is:
Taxi estimate ₩45,000 + Air Seoul ₩89,500 + Seoul subway base ₩1,550 = ₩136,050
That is ₩42,000 more than the bus version because only the Jeju transfer changed. Choose the taxi when that extra amount buys a departure plan that the bus cannot support, not because it makes the full trip cheaper.
Step-by-step: from the crater entrance to a Seoul arrival
Set the flight first. Pick a CJU-to-GMP flight, then work backwards to the Bus 111 stop or taxi pickup. The Korea Airports Corporation Gimpo schedule page is the official schedule source and states that airlines can adjust published schedules.
Plan the Seongsan visit around the airport transfer. VISITKOREA’s Seongsan Ilchulbong listing gives the address as 284-12 Ilchul-ro, Seogwipo-si, Jeju-do. In May through August, published hours are 04:30–20:00 and last ticketing is one hour before closing. The site closes on the first Monday of each month unless that Monday is a holiday.
Board Bus 111 at Seongsan Ilchulbong Entrance, or take a pre-arranged taxi. A transit card avoids the cash maximum rule when the calculated distance fare is lower, though the full eastern-to-airport journey should be budgeted at the ₩3,000 cap.
Fly to Gimpo, not automatically Incheon. Gimpo gives the cleanest Seoul arrival plan for the published Jeju domestic route. An Incheon search result can be misleading when it refers to a seasonal or ended service.
Use Seoul transit for the last leg. A transit card starts at the published ₩1,550 subway base fare. Keep the flight-arrival airport and the hotel district separate in the plan; “Seoul” is not one fixed final stop.
Timing traps that cause missed flights
No current official source publishes one fixed door-to-door time from Seongsan Ilchulbong to central Seoul. It cannot be reduced to one number because the result changes with the selected Bus 111 departure, airport procedures, the booked flight, airline schedule adjustments, and the final Seoul address.
The practical mistake is treating the 100-minute Seongsan-eup taxi estimate as a full journey time. It only covers the road transfer between Seongsan-eup and Jeju Airport. It does not include waiting for a bus, check-in, security, boarding, a flight delay, baggage collection, or travel from Gimpo to the hotel.
A second mistake is leaving immediately after a sunrise climb with a very tight flight. Seongsan Ilchulbong’s May–August opening begins at 04:30, but an early opening time does not guarantee a predictable completion time for the walk, photos, restroom stop, and transfer to the bus stop. The plan fails if the bus timing does not leave a meaningful airport buffer.
A third mistake is comparing only headline airfare. A ₩89,500 weekday flight looks cheaper than a higher ticket, yet a ₩45,000 taxi can erase that saving. Compare the entire first leg to Seoul with the arithmetic above.
Questions before leaving Seongsan
How long does Seongsan Ilchulbong to Seoul take?
No current official fixed door-to-door duration is published. The Korea Airports Corporation’s 100-minute figure applies only to a regular taxi between Seongsan-eup and Jeju International Airport; the full journey also depends on the actual bus or taxi departure, airport time, flight, and onward Seoul transfer.
Is Bus 111 cheaper than a taxi to Jeju Airport?
Yes. As of August 2026, the express-bus maximum is ₩3,000 while Korea Airports Corporation estimates a regular taxi from Seongsan-eup at ₩45,000, a difference of ₩42,000 before the flight.
Should I fly from Jeju to Gimpo or Incheon?
Plan around Gimpo for this route. Jeju Air’s direct Jeju-to-Incheon service in the supplied official tourism notice was scheduled only through August 7, 2026, so it should not be treated as an August 19, 2026 option.
What is the cheapest published starting budget?
The lowest example in this guide is ₩92,500 before Seoul local transit: ₩3,000 for the maximum Bus 111 fare plus Air Seoul’s ₩89,500 weekday regular CJU-to-GMP fare. Add ₩1,550 for Seoul’s published transit-card base fare to reach ₩94,050.