📋 Table of Contents

🏢 1. The Terminal & the World’s Busiest Route

Jeju runs everything through a single passenger terminal, with the domestic and international operations split into adjacent wings rather than separate buildings. The overwhelming majority of traffic is domestic — Jeju to the mainland, and above all Jeju to Seoul Gimpo, which the OAG ranked the world’s busiest airline route in 2025 at around 14.4 million seats for the year, roughly 39,000 a day. The flight is under an hour and departures stack up through the day, which is why the route gets described as an air-metro. International service is a thinner layer on top, weighted toward East Asia and a band of Southeast Asian leisure destinations.

On the carrier side, the heavy hitters on the Seoul run are Korean Air and Asiana, each with more than 200 weekly departures, followed by Jeju Air at around 150. A clutch of low-cost and regional operators — T’way Air, Jin Air, Air Busan, Air Seoul, Eastar Jet — fill out the rest of the schedule. Note that despite the name, Jeju Air is hubbed in Seoul, not based on the island; CJU is a destination for these airlines, not their home base. That matters less to a passenger than it would at a connecting hub, because almost nobody connects here — Jeju is where the journey ends.

Because the international wing is small, the international departures experience is brisk rather than sprawling. The flip side is that the domestic side can be intensely busy at peak hours, since this is a high-frequency shuttle operation moving a large slice of Korea’s leisure traffic through one terminal.

🛂 2. Korea’s Border Rules at CJU: K-ETA, Jeju’s Visa Waiver & the e-Arrival Card

Entry here runs on South Korea’s national system, with one island-specific wrinkle that Jeju adds on top. Nothing else applies — this is Korea’s own regime, and the rules below are the whole of it.

K-ETA — and the waiver that currently suspends it

The Korea Electronic Travel Authorization (K-ETA) is normally required of visa-free visitors before boarding. As of 2026 it is temporarily waived: citizens of 67 countries and territories — including the United States, United Kingdom, Canada, Australia, New Zealand, and the EU member states — do not need a K-ETA to enter, and the waiver has been extended through 31 December 2026. From 1 January 2027 the requirement is set to return for those nationalities. You can still apply for a K-ETA voluntarily during the waiver window — the only practical reason to do so is that holding one exempts you from filing the arrival card separately. Travellers aged 17 and under or 65 and over are exempt from K-ETA in any case.

The e-Arrival Card — mandatory from 1 January 2026

This is the genuine 2026 change. South Korea’s e-Arrival Card — the digital replacement for the old paper disembarkation slip — became mandatory for foreign arrivals from 1 January 2026, and it must be completed within the three days before you land. The catch that trips people: being exempt from K-ETA does not exempt you from the e-Arrival Card. If you are travelling visa-free without a K-ETA, you still have to file the card. The only people who skip it are those who voluntarily hold a valid K-ETA (which already captures the same information). Fill it in before you fly; it is faster than discovering the requirement at a busy arrivals hall.

Visa-free short stay vs a standard visa

Beyond Jeju’s own scheme, many nationalities can enter mainland Korea visa-free for short stays under the national visa-waiver and reciprocal arrangements. Those who don’t qualify need a Korean visa arranged in advance at a consulate or visa centre before travel. There is no general tourist visa-on-arrival.

Jeju’s separate 30-day visa waiver — and its trap

Jeju Province runs its own visa-waiver scheme, distinct from the national rules: most ordinary-passport holders can enter through Jeju International Airport or the island’s seaports and stay up to 30 days without any visa. Citizens of 23 listed nationalities are excluded from it — among them Afghanistan, Bangladesh, Iran, Iraq, Myanmar, Nepal, Pakistan, Sri Lanka, Syria, Uzbekistan and Yemen. Mainland Chinese travellers are handled separately again, through an authorised group-tour arrangement; a temporary scheme runs through 30 June 2026 allowing registered Chinese tour groups of more than three people a 15-day visa-free stay.

The trap worth naming directly: the Jeju waiver lets you onto the island, not into the rest of Korea. It does not authorise onward travel to the mainland. Fly Jeju-direct on the waiver and you cannot legally continue to Seoul without the appropriate national entry status. And the waiver is not a guarantee — immigration discretion is real here. A viral February 2026 detention-and-deportation case, which drew an advisory from the Indian Embassy in Seoul, turned on exactly this: officers can ask for printed hotel bookings, a day-by-day itinerary, proof of funds and a return ticket, and can refuse entry on inconsistent answers. Carry the paperwork.

🚌 3. Getting Into the City: Buses, the Limousine 600 & Taxis

The defining fact is the distance: central Jeju City is only about 3 km from the terminal, so getting into town is a short hop, not the planned expedition it is at most big airports. There is no airport rail on Jeju — the island has no metro or train at all — so everything below is road transport.

⭐ City buses — the cheap way into town

Jeju City’s local bus network serves the airport directly, and several routes run the short distance into the downtown areas. Route 365 is the one most useful to arriving visitors: it loops through the three main downtown nodes — Jeju City Hall, the Jungang Rotary / Dongmun Market area, and the New Jeju district — and calls at the airport on its circuit. Pay with a Korean transit card (T-money or a local equivalent) tapped on boarding, or cash. Fares on Jeju’s local buses are low, but the exact amount is best confirmed from the on-stop signage on the day rather than quoted from a figure that drifts; the ride into the centre is short regardless. Buses depart from the stops directly outside the arrivals area.

🚐 Airport Limousine Bus 600 — for the south coast

The Airport Limousine 600 is the route to know if you are heading for the resort strip rather than Jeju City. It runs from the airport down to the Jungmun resort complex and Seogwipo on the south coast, a long cross-island haul of roughly an hour and three-quarters end to end, for up to ₩5,500 (about US$3.70 / €3.10). It departs every 18–20 minutes and picks up at ground-floor gate 5. For Jeju City itself the 600 is overkill — it’s a south-coast express — but for Jungmun’s hotels it’s the standard public option.

🚕 Taxis & rideshare

Metered taxis queue outside arrivals and, given the 3 km distance, a taxi into central Jeju City is cheap and quick — minutes, not a meter-watching slog. Use the official rank rather than anyone approaching you inside the terminal with an offer of a ride, which is the usual unmarked-taxi overcharge trap. For the south coast a taxi is a real fare given the cross-island distance, so weigh it against the 600. Korean ride-hailing apps operate on the island; a metered cab from the rank is the simplest default for a short trip into town.

🛋️ 4. Lounges: Which Card Gets You In

CJU has two lounges, both on the 3rd floor of the departures level, and both run by the flag carriers: the Korean Air (KAL) Lounge and the Asiana Lounge.

The Korean Air Lounge sits near the Korean Air check-in counters, opposite Gate 2, open roughly 06:00–21:00. It admits Korean Air First and Prestige Class passengers, qualifying SKYPASS and SkyTeam Elite Plus members on same-day flights — and it is on the Priority Pass network, so a Priority Pass card gets you in regardless of which airline you’re flying, subject to capacity.

The Asiana Lounge is on the same floor next to the Asiana check-in desks, open from the early morning to around 21:00–22:40. It serves Asiana Business Class, Asiana Club elite tiers and Star Alliance Gold members. It is also listed on Priority Pass — but with an important restriction: access is tied to flying an Asiana-operated flight that day, so a Priority Pass card alone will not get you in unless you’re on Asiana metal. If you hold Priority Pass and aren’t flying Asiana, the Korean Air Lounge is your route in. DragonPass coverage at CJU is not something I can confirm for either lounge, so don’t count on a DragonPass card here without checking it against the specific lounge at the desk.

🍜 5. Jeju Food: Black Pork, Galchi, Haemul & Hallabong

Jeju’s food is one of the better reasons to leave the terminal, and it leans hard on the island’s own produce. The signature is heuk-dwaeji — Jeju black pork, from the island’s native breed, grilled at the table and eaten with the local coarse salt and dipping sauces; the black-pork restaurant streets in Jeju City are where it’s done properly. Galchi (cutlassfish / hairtail) is the island fish, served either grilled whole or as a soupy stew with radish and pepper, and it’s a Jeju staple in a way it isn’t on the mainland. Haemul — the broad seafood category — runs to the abalone the island is known for and to the catch brought up by Jeju’s haenyeo, the female free-divers whose shellfish is sold fresh along the coast. For something sweet, hallabong is the local citrus, a knobbly tangerine-orange hybrid named after Hallasan, sold fresh and worked into juice, chocolate and cake island-wide.

The terminal’s food outlets do serviceable versions of the staples, but airport prices are airport prices; if you have time, the city’s restaurant streets are a short bus ride away and far better value. Eat in town when you can.

Duty-Free & Souvenir Reality at CJU

Jeju has a notable duty-free presence — the island’s tourist economy supports sizeable downtown duty-free halls as well as the airport’s — so the airside run covers the usual liquor, cosmetics and tobacco. The Jeju-specific buys are hallabong products and Jeju green-tea goods, both cheaper bought in town than airside. If a hallabong souvenir is the plan, pick it up in the city and leave only a forgotten gift for the gate.

💡 6. Layover Reality: a 3 km Airport Changes the Math

Most airport guides open the layover section with a warning about distance. Here it’s the opposite. At roughly 3 km from central Jeju City, CJU is one of the most layover-friendly major airports anywhere — the city is a sub-15-minute taxi ride, or a short city-bus hop, from the door.

Run the round-trip math honestly. Into central Jeju City and back is a matter of minutes each way by cab, call it 15–20 minutes per leg with traffic and the walk to the rank. Add the international check-in and security buffer for your onward flight, and even a 4-hour layover leaves real time on the ground — enough for a black-pork lunch on one of the city’s restaurant streets, a look at Dongmun Market (the central traditional market, near the Jungang Rotary), or the small Yongduam (Dragon Head) Rock on the coast a short ride from the airport. None of that is a gamble against your boarding time the way a city run is at a 40 km airport.

What 4 hours does not buy you is the island’s headline sights. Hallasan, the volcano at the island’s centre, is a full-day undertaking — the summit hikes run many hours and the trailheads are well inland. The Seogwipo coast and the Jungmun resorts are on the far south side; the Limousine 600 alone is the better part of two hours each way, so the south coast needs the better part of a day, not a layover. The east-coast sights — Seongsan Ilchulbong, the UNESCO-listed tuff-cone sunrise peak — are an hour-plus out by road and not realistic on a short stop either. The rule of thumb: a layover here gets you Jeju City and the near-airport coast comfortably; the volcano, the south coast and the eastern peaks need an overnight.

For an overnight or a deliberate stopover, the short transfer makes a city hotel near Dongmun or in New Jeju an easy base, and the island’s real geography opens up.

🔧 Practical Notes — Connectivity, Currency, Border

Payment. South Korea is close to cashless. Cards are accepted almost everywhere, contactless is standard, and a foreign card will cover hotels, restaurants and most shops without trouble. A T-money (or local Jeju transit) card, toppable with cash at convenience stores, is the practical way to pay for city buses. Carry a little cash (₩) for the smallest vendors and market stalls, but you won’t lean on it.

Connectivity. Unlike some neighbours, Korea doesn’t block Western apps — your usual services work normally. Airport and public Wi-Fi are widely available, and a Korean travel eSIM or a pocket Wi-Fi rental (rentable at the airport) gives reliable data the moment you land.

Currency. The won has been weak through 2026 — roughly ₩1,500 to the US dollar and ₩1,758 to the euro as of late May 2026, near multi-year lows. Airport exchange counters give a poor rate against a markup; change only what you need there and rely on cards or a city ATM for the rest. Since the country runs on cards, most visitors barely touch a bureau de change at all.

Border. Re-read section 2 before you fly. Two things catch people at CJU specifically: the e-Arrival Card is mandatory even if your nationality is K-ETA-exempt, and the Jeju visa waiver does not let you continue to the mainland. File the card in the three days before arrival, and match your route to the right entry path before check-in, not at the immigration desk.

❓ Frequently Asked Questions

📊 2026 Summary Data Table