Route · GMP → CJU
Flights from Seoul to Jeju
The GMP–CJU corridor is one of the busiest domestic air routes on the planet, covering roughly 450 kilometres between Seoul's Gimpo Airport and Jeju Island in a typical block time of just over an hour. Seven carriers compete here — Korean Air and Asiana on full-service tickets, with low-cost operators Jeju Air, Jin Air, Air Busan, T'way Air, and Eastar Jet filling the bulk of seats aboard narrow-body Boeing 737s and Airbus A320-family jets. A practical note worth knowing: Gimpo departs from domestic Terminal 1, keeping check-in and security straightforward, though weekend morning banks can be congested enough to warrant arriving 90 minutes ahead. Fares and seat availability are typically tightest from late July through mid-August and again over the Chuseok and Lunar New Year holidays; mid-week departures in shoulder months like April or November often yield the most comfortable booking windows.
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Cheapest dates to fly
Live prices · powered by AviasalesThe calendar below pulls live fares from our search partner for Seoul (GMP) → Jeju (CJU). Use the year view… to spot the cheapest week to fly, the day-of-week patterns most travellers miss, and any shoulder-season dips worth shifting your trip around. Prices refresh every few hours, so what you see is what your booking page should look like a moment later — click any date to jump straight to the fare on Aviasales.
Airlines on this route
7 carriersThe 7 carriers we currently track on the Seoul–Jeju route, from full-service flag carriers to low-cost competitors. Tap any airline for its full profile, baggage… rules, fleet context, and a live fare search pre-filtered to that carrier — useful if you're loyal to a frequent-flyer programme, want to compare onboard product on the same dates, or are weighing a cheaper one-stop against a pricier nonstop.
Flights from Seoul to Jeju
Live schedule · powered by AviasalesBelow is the published weekly schedule for nonstop and one-stop services from Seoul to Jeju — the actual flight numbers, departure and arrival times your… booking page will pull from. Use it to plan around departure preferences (early morning vs late evening), see which carriers fly on which weekdays, or pick a connection that lets you sleep in your own bed before a long-haul leg. Click any row to load it directly in the search.
Airport guides
Quick links into the airport profiles at both ends of the route. Each guide covers terminal layout, the airlines that base hubs at GMP and… CJU, the other routes those airports serve, and the ground-transit options most travellers wish they'd read about before landing — the practical context you only really need to know once you've booked, but want to skim before you do.