Jeju: bus vs rental car vs taxi tour
Jeju rewards a rental car more than almost anywhere else in Korea — but only if your group is at least three, your trip is at least three days, and you actually have an International Driving Permit. Most Jeju transport guides skip the IDP rule and assume you can just hop on a scooter. You can't, not legally. The other thing most guides skip is that Jeju's city bus + day pass genuinely works for Hallasan and the south coast if you time the 1100 to Hallasan (it runs every 15–20 minutes and the last bus back is around 21:30 in winter, later in summer). This tool puts the four real options on the same line so you can see which one wins for your group size, season and appetite for Korean road signs.
Cost calculator
What this solves
Generic Jeju guides default to "rent a car!" without asking how many people you are or whether you'd feel comfortable with a Jeju Google cert. For solo or pair travelers, the bus + day-pass path is genuinely cheaper and removes the parking headache at Hallasan and Seongsan. For groups of 4+, the rental car almost always wins — but only when you factor in the realistic ~30,000 won/day fuel cost (Jeju is bigger than it feels on a map). For groups that want zero driving, the full-day taxi tour is honest but expensive, and you can split it for 3–4 people to make it comparable. This tool shows you all four numbers at once.
Bus pass tiers
Jeju city buses accept T-money and the standard 1-day pass at ₩5,000 (1-day unlimited city routes; activated on first tap, valid 24h) and a 3-day pass around ₩10,000. Airport limousine buses and the long-distance 1100 to Hallasan are separate (cash or T-money). Don't expect to use the city pass on the airport route — it doesn't work there.
Rental car companies
The reliable chains at Jeju Airport are 롯데렌터카 (Lotte Rent-a-Car), AJ렌터카 (AJ Rent-a-Car), SK렌터카, and 제주렌트카. Compact cars in peak season run ₩70,000–₩110,000/day; mid-season ₩50,000–₩80,000; low-season ₩35,000–₩55,000. Always confirm pickup at the airport branch and not a "shuttle partner" that adds 30 min.
Taxi tour split
Full-day taxi tours in Jeju run ₩300,000–₩450,000 for a 7–8 hour day (driver, fuel, usually 3–4 stops). Split among 3 it's ₩100,000–₩150,000 per person — only worth it if you really don't want to drive. Half-day tours (4h) run ₩180,000–₩250,000.
Hallasan bus 1100
The 1100 from Jeju Intercity Bus Terminal to Hallasan (Seongpanak trail) runs roughly every 15–20 minutes and the last return bus from Hallasan is around 21:00 in peak season, 18:30 in winter. If you miss it, only taxis go up — and they charge for the empty return. Plan the descent, not just the climb.
How to read the result
- Per-person cost is total trip cost divided by group size — so it's already apples-to-apples.
- Rental car includes fuel (toggle off if you drive electric or hybrid) and assumes 1 car.
- Taxi tour assumes a 4-person split. With 2 people it's almost never worth it.
- KTX+ferry is shown for comparison only — most visitors fly.
- The recommended badge considers price, flexibility, and IDP requirement.
Limitations
- Taxi-tour prices vary a lot by season and driver; we use 2026 mid-season ranges, not quotes.
- Rental car insurance tiers (basic / full / super) can swing the price ₩15,000–₩30,000/day — this tool does not separate them.
- The "KTX+ferry" path requires a 12-hour cold cut and is rarely time-efficient for under 4 days on Jeju.
- IDP rule enforcement: Jeju is the strictest in Korea. If you don't have one, the rental desk will refuse you, period.
- Parking at Hallasan, Seongsan and major beaches is free but fills before 10:00 in peak season — the calculator cannot predict that.
FAQ
Do I really need an IDP for Jeju?
Yes. Jeju police actively check at popular stops. The 1949 Geneva Convention IDP from your home country is accepted. Korean police do not recognize digital-only permits.
Is the city bus pass worth it for one day?
Only if you'll take 4+ buses that day. A single ride is ₩1,200–₩1,500 in Jeju city; the day pass pays back around 4 rides.
Can I drive the Olle trails with a rental car?
Yes. Olle trail heads have parking. The trails themselves are pedestrian; the rental car just gets you to the start.
What if it rains?
Jeju rain is real, especially May and July. A rental car with rain becomes water damage insurance; check the policy for hydrostatic exclusions.