The official Jeju bus fare page lists standard adult trunk/local buses at KRW 1,150 with a transit card or KRW 1,200 cash. Express buses start at KRW 2,000 for 20 km on a card, with distance supplements up to KRW 3,000; cash passengers are charged the maximum. Teenagers pay KRW 850 on regular routes or from KRW 1,600 on express; children aged 6 to under 13 pay KRW 350 or from KRW 1,000. Check route type and tap-out rules. Fares may change, so use the live official table.