Route · CJU → GMP
Flights from Jeju to Seoul
The Jeju–Seoul Gimpo corridor is one of the busiest domestic air routes on the planet, covering roughly 450 kilometres in just over an hour of block time and operating dozens of departures daily across seven carriers. Jeju Air, Jin Air, T'way Air, and Air Busan dominate the schedule with narrow-body Boeing 737s and Airbus A320-family jets, while Korean Air and Asiana add capacity on the same equipment and occasionally slot in larger frames during peak season. A practical note worth knowing: flights arrive at Gimpo (GMP), not Incheon, placing you on Seoul's west side with direct access to the Seoul Metro Line 5 and the AREX rail link for onward connections. Fare patterns tend to tighten sharply around Chuseok and Lunar New Year; mid-week departures in late winter and early autumn typically offer the most availability and relatively relaxed pricing.
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Cheapest dates to fly
Live prices · powered by AviasalesThe calendar below pulls live fares from our search partner for Jeju (CJU) → Seoul (GMP). 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 Jeju–Seoul 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 Jeju to Seoul
Live schedule · powered by AviasalesBelow is the published weekly schedule for nonstop and one-stop services from Jeju to Seoul — 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 CJU and… GMP, 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.