Originfacts

Flight route

Flights from Jeju (CJU) to Seoul (GMP)

Distance, flight time and the airlines in Originfacts’ route record for Jeju to Seoul, the two airports, and partner fare tools. Each figure shows where it came from.

IATA code CJUFromJejuJeju International Airport, South Korea
451 km~1h 1m est.
IATA code GMPToSeoulGimpo International Airport, South Korea
In our route record:Jeju AirAir BusanKorean AirJin AirAsiana AirlinesT'way AirEastar Jet
Find flights CJU → GMP

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Route record, updated 21 May 2026Where this comes from

CJU → GMP at a glance

  • Distance

    451 km

    About 280 miles: the great-circle distance between the two airports’ coordinates.

    Route record · checked against coordinates

  • Flight time

    ~1h 1m

    An estimate, not a timetable. The airline’s schedule gives the actual time.

    Route record estimate

  • Time difference

    None

    CJU and GMP are both on UTC+9 today. CJU: Asia/Seoul (UTC+9) · GMP: Asia/Seoul (UTC+9)

    Calculated from IANA time zonesTime zones: Time difference

  • Airlines in route record

    7

    Jeju Air, Air Busan, Korean Air, Jin Air, Asiana Airlines, T'way Air and Eastar Jet

    Originfacts route recordSee airlines: Airlines in route record

  • Return route

    GMP → CJU

    Flights from Seoul back to Jeju.

    Originfacts route recordRelated routes: Return route

Airlines on the CJU–GMP route

Route record · 21 May 2026

The airlines Originfacts’ route record lists for CJU–GMP, after leaving out carriers listed only through a recycled airline code or as a codeshare. It is not a full schedule and does not say which airlines fly nonstop; check current flights with the airline.

Baggage and check-in rules are each airline’s general rules, read from its own site on the date shown. They are not specific to this route, and your fare type can change them: check your booking.

Fare calendar and schedule for CJU → GMP

Partner tools · indicative

Two tools from Aviasales, our flight-search partner. They load only if you allow advertising cookies. Prices in them come from recent searches and are indicative, not quotes; the fare on the booking page can differ. The schedule shows flights in the partner’s data, including codeshares sold by other airlines.

Fare calendar

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Or search on flights.originfacts.com, our partner’s site

Flight schedule

This flight schedule is provided by our partner Travelpayouts (Aviasales) and sets cookies.

Or search on flights.originfacts.com, our partner’s site

The airports: Jeju International Airport and Gimpo International Airport

Airport records · OurAirports · Wikidata

  • Departure

    Jeju International AirportCJU

    Codes
    CJU · RKPC (IATA · ICAO)
    Serves
    Jeju, South Korea
    Time zone
    Asia/Seoul (UTC+9 today)
    Coordinates
    33.510°, 126.490°
    Size class
    Large airport
    Runways
    2, longest 3,180 m (07/25)
    Operator
    Korea Airports Corporation
    Passengers
    29.7 million in 2022

    Size class, runways: OurAirports, 5 Oct 2026. Operator, passengers: Wikidata (opens in a new tab), 5 Oct 2026 (passengers citing airport.co.kr (opens in a new tab)).

    Jeju airport guide

  • Arrival

    Gimpo International AirportGMP

    Codes
    GMP · RKSS (IATA · ICAO)
    Serves
    Seoul, South Korea
    Time zone
    Asia/Seoul (UTC+9 today)
    Coordinates
    37.560°, 126.800°
    Size class
    Large airport
    Runways
    2, longest 3,600 m (14L/32R)
    Operator
    Korea Airports Corporation
    Passengers
    24.5 million in 2022

    Size class, runways: OurAirports, 5 Oct 2026. Operator, passengers: Wikidata (opens in a new tab), 5 Oct 2026 (passengers citing airport.co.kr (opens in a new tab)).

    Seoul airport guide

Each airport guide lists the airport’s codes, location and time zone, any other routes and airlines Originfacts tracks from CJU or GMP, current weather and nearby airports, and where to check terminal and transport details.

Weather in Seoul: average high, low and rain by month

NASA POWER · modelled · 2016–2025

Averages of NASA POWER (opens in a new tab) daily values for 2016–2025 at 37.56°, 126.80° near GMP (MERRA-2 reanalysis grid, about 50 km cells), worked out by Originfacts. Modelled, not weather-station readings or a forecast.

In October, Seoul averages a daily high of 19°C and a low of 10°C, with about 90 mm of rain over the month.

Average daily high and low temperature and average monthly rain near GMP, 2016–2025
MonthHighLowRain
Jan2°C-6°C20 mm
Feb4°C-4°C27 mm
Mar11°C0°C44 mm
Apr17°C6°C65 mm
May22°C11°C99 mm
Jun26°C17°C140 mm
Jul29°C22°C304 mm
Aug29°C23°C262 mm
Sep26°C18°C162 mm
Octthis month19°C10°C90 mm
Nov12°C3°C56 mm
Dec3°C-4°C30 mm

Seoul airport guide

Getting to and from CJU and GMP

Not yet verified

Ground transport, terminals and parking at either airport have not been checked against the airports’ own pages yet, so none are listed here.

Jeju to Seoul: common questions

Which airlines fly from Jeju to Seoul?

Originfacts’ route record for CJU–GMP lists Jeju Air, Air Busan, Korean Air, Jin Air, Asiana Airlines, T'way Air and Eastar Jet. It is not a full schedule; check current flights with the airline before booking.

How far is Jeju from Seoul by air?

About 451 km, the great-circle distance between Jeju International Airport and Gimpo International Airport.

How long is the flight from Jeju (CJU) to Seoul (GMP)?

The Originfacts route record estimates about 1h 1m nonstop. It is an estimate, not a timetable: the airline’s schedule gives the actual flight time.

Is there a time difference between Jeju and Seoul?

No. Both airports are on UTC+9 today (time zones Asia/Seoul and Asia/Seoul).

Sources

Where each part of this page comes from
  • Distance, flight-time estimateOriginfacts route record, checked against the great-circle distance between the airport coordinates21 May 2026
  • AirlinesOriginfacts route record, leaving out carriers listed only through a recycled airline code or as a codeshare21 May 2026
  • Baggage and check-inEach airline’s own pages, via the Originfacts airline fact files; only checked values are shown5 Oct 2026 – 6 Oct 2026
  • Airport codes, time zonesOriginfacts airport records12 Jun 2026
  • Time differenceCalculated from each airport’s IANA time zone, with daylight saving applied for today’s dateToday
  • Airport size class, runwaysOurAirports (opens in a new tab) open data (public domain); the size class is OurAirports’ own, not an official category5 Oct 2026
  • Airport opened, operator, passengersWikidata (CC0), each airport’s own item; passenger figures are the latest year recorded there, with its reference where Wikidata gives one5 Oct 2026
  • Weather in SeoulNASA POWER (opens in a new tab) daily data (MERRA-2 reanalysis), averaged by month by Originfacts. Modelled, not weather-station readings2016–2025
  • Fare calendar, scheduleAviasales widgets, loaded with advertising consentLive

Schedules, fares and airline rules change. Confirm with the airline before you travel.