Jeju Air: Kyushu to Korea Up to 20% Off, One-Way from 100 Yen

Lowest one-way total (airport taxes included)JPY 13,730and upKagoshima to Seoul (Incheon). Fukuoka, the one advertised at JPY 100, comes to JPY 14,630 — the dearest of the three

Airline

Jeju Air

Routes

Oita, Kagoshima and Fukuoka to Korea (Seoul Incheon and Busan). Nothing from the Kanto or Kansai regions

Sale period

2026-08-19 – 2026-08-25

Travel period

2026-08-19 – 2026-11-30

Deadline

2026-08-25, or until the discounted seats sell out (first come, first served)

Checked on

2026-08-19

Jeju Air sold a Kyushu-to-Korea promotion out of three airports — Oita, Kagoshima and Fukuoka. Selling ran from 19 to 25 August 2026, with travel to 30 November. The headline was JPY 100 one way from Fukuoka to Seoul (Incheon) and Busan, and a discount code worth up to 20 per cent went out alongside it.

The JPY 100 fare from Fukuoka is the most expensive of the three once tax is in

Three fares were published, and the order changes depending on which column you read.

Totals include airport taxes and the fuel component. Checked on 2026-08-19.

Cutting the fare portion to JPY 100 does nothing to the taxes and the fuel component sitting behind it, which is why the eye-catching departure point ends up dearest. Kagoshima is the cheapest and the spread across the three airports is JPY 900. The fare types are not level either: Oita and Kagoshima are quoted as STANDARD with 15 kg of checked baggage, while Fukuoka is BASIC with none, so a checked bag from Fukuoka goes on top of the JPY 14,630. Choose by the one-way fare column and the ranking reverses as soon as the conditions are matched. Reading a fare display against what it leaves out is set out separately.

The code was KYUSHUTOKR. It applies to STANDARD fares, requires a logged-in Jeju Air member, and works only on bookings whose first sector departs Japan. It also has ceilings, tested per one-way leg: JPY 14,100 or less for Oita and Kagoshima to Incheon, JPY 11,900 or less for Fukuoka to Incheon, JPY 11,400 or less for Fukuoka to Busan. The airline’s own worked example says that an outbound at JPY 7,300 with a return at JPY 30,500 takes the discount on the outbound only, and that JPY 30,500 both ways takes it on neither. A cheap outbound with an expensive return therefore gets half a discount. The code could be used between 19 and 25 August for departures between 19 August and 30 November, and it stacks with the 5 per cent first-booking discount for new members in the app — the new-member discount first, the code on top of what is left.

When does the next airfare sale come? Six weeks of records and what is bookable now →

More: level the totals and the three Kyushu airports sit within JPY 900 of each other

Kagoshima JPY 13,730, Oita JPY 14,530, Fukuoka JPY 14,630. Sorted by what you actually pay, the three airports fall inside a JPY 900 band, even though the fare portions read JPY 100, JPY 1,500 and JPY 2,300. The taxes and the fuel component absorb the difference. Treating the payment as effectively the same wherever in Kyushu you leave from makes the decision faster, because the real variable is elsewhere.

That variable is baggage. Fukuoka alone is BASIC, so a checked bag reorders the three at once. Add the cost of reaching the airport and the answer comes down to where you live rather than which fare looked lowest. At the far end, the three-day Seoul itinerary has the ground costs and eSIM against pocket Wi-Fi covers getting online. Room rates move over the autumn holidays, so what a night in Seoul costs then belongs in the same total as the JPY 900.

Source: Jeju Air official event page, “Kyushu to Korea promotion” (checked 2026-08-19) / Photo: Jeong Chan-song, CC BY 2.0 KR (Wikimedia Commons — Boeing 737-8AS HL8088 at Jeju International Airport) / Checked on 2026-08-19