Ride Jeju's Red and Blue Express Buses
Jeju has no train, no subway, and on a lot of days no interest in playing nice with a rental car search that comes up empty at the airport counter, so the bus network carries more of this island than most visitors assume.
Two express tiers do the heavy lifting. The Red Express Buses (100-series) run high-speed, limited-stop routes linking Jeju International Airport and Jeju Bus Terminal to the island’s major hubs: Bus 101 rings the east coast, Bus 102 rings the west coast, and Buses 181 and 182 cut straight across the mountain, over Hallasan, connecting the north and south sides in under an hour and a half. The Blue Trunk Buses (200-series) fill in everywhere else, reaching every town and tourist village on the island at a flat fare of 1,200 to 3,000 KRW. Every fare goes on a T-money card or a foreign contactless card; the buses are cashless, full stop, so load a card at any convenience store before your first ride rather than at the stop.
If you’d rather sit back with a narrated route than plan transfers yourself, Yeha Bus Tour has run English-language full-day coach excursions for years, rotating an East Course (Seongsan, Manjanggul, a Haenyeo show), a West Course (Hallim Park, O’sulloc, Suwolbong), and a South Course (Jusangjeolli, Cheonjiyeon, Mount Sanbangsan) for roughly 85,000 to 95,000 KRW, lunch and admission fees included. That price buys you a full day without touching a bus schedule, a real advantage if you’re only on the island for two or three days and don’t want to burn one of them figuring out transfers.
There’s also the Jeju Golden City Tour Bus, a hop-on hop-off double-decker that sticks to the northern coastal landmarks right around the capital; it’s a city-sightseeing tool more than an island one, so if that’s your focus for the day, treat it as a separate trip rather than folding it into an island-wide itinerary.
The verdict: for a first Jeju trip without a car, pick one narrated coach course to cover a region in a single day, then use the Red and Blue buses to fill the gaps on the days in between; relying on Blue Trunk buses alone works but eats hours in transfer time you’ll wish you’d spent at Manjanggul or Seongsan instead. Before you leave the airport, load your T-money card and download Naver Map or KakaoMap, since Google Maps does not provide turn-by-turn transit directions in South Korea and you don’t want to find that out mid-transfer. For where all these routes are actually taking you, our multi-day trip guide lays out which regions pair well on the same day.