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Jeju to Seoul flights in December 2026 from $20 CJU → GMP, ICN

Jeju International Airport (CJU) → Gimpo International Airport (GMP), Incheon International Airport (ICN)

For departures in December 2026, the cheapest return found recently is $64 with Air Seoul, 21 Dec – 29 Dec, found 2 days ago. The cheapest one-way found recently is $20 with Jeju Air, 22 Dec, found 2 days ago.

Return

In December 2026, the cheapest return fare on each of 4 departure dates is usually $61 to $70. Across all 14 departure dates we hold on this route, it is usually $68 to $184. Of the 2 months with enough return fares to compare, December 2026 is usually the cheapest.

Cheapest return found recently

$64

21 Dec – 29 Dec · Air Seoul

Jeju International Airport (CJU) → Gimpo International Airport (GMP)

out nonstop, back nonstop

found 2 days ago

See prices for these datesCheck today's price

Cheapest we hold, of any age

$50

8 Dec – 10 Dec · Jeju Air

Jeju International Airport (CJU) → Gimpo International Airport (GMP)

out nonstop, back nonstop

found 4 days ago

See prices for these datesCheck today's price

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
8 Dec – 10 Dec$50Jeju Airout nonstop, back nonstopfound 4 days agoSee prices for these dates
21 Dec – 29 Dec$64Air Seoulout nonstop, back nonstopfound 2 days agoSee prices for these dates
30 Dec – 5 Jan 2027$66Jeju Airout nonstop, back nonstopfound 2 days agoSee prices for these dates
22 Dec – 1 Jan 2027$81Air Seoulout nonstop, back nonstopfound 7 days agoSee prices for these dates

Every date we hold

4 departure dates

8 Dec – 10 Dec: $50, found 4 days ago21 Dec – 29 Dec: $64, found 2 days ago22 Dec – 1 Jan 2027: $81, found 7 days ago30 Dec – 5 Jan 2027: $66, found 2 days agoDec
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
8 Dec – 10 Dec$50Jeju AirJeju International Airport (CJU) → Gimpo International Airport (GMP)out nonstop, back nonstopfound 4 days agoSee prices for these dates
21 Dec – 29 Dec$64Air SeoulJeju International Airport (CJU) → Gimpo International Airport (GMP)out nonstop, back nonstopfound 2 days agoSee prices for these dates
22 Dec – 1 Jan 2027$81Air SeoulJeju International Airport (CJU) → Gimpo International Airport (GMP)out nonstop, back nonstopfound 7 days agoSee prices for these dates
30 Dec – 5 Jan 2027$66Jeju AirJeju International Airport (CJU) → Gimpo International Airport (GMP)out nonstop, back nonstopfound 2 days agoSee prices for these dates

Which month looks cheapest?

December 2026 is the cheapest month — from $50.

November 2026From $612 departure dates27 Nov – 28 Nov · found 3 days agoSee prices for these datesEvery date in November 2026
December 2026From $50Cheapest seen4 departure dates8 Dec – 10 Dec · found 4 days agoSee prices for these dates
January 2027From $1121 departure date2 Jan 2027 – 8 Jan 2027 · found 5 days agoSee prices for these datesEvery date in January 2027
March 2027From $723 departure dates18 Mar 2027 – 22 Mar 2027 · found 7 days agoSee prices for these datesEvery date in March 2027
April 2027From $1762 departure dates5 Apr 2027 – 5 Apr 2027 · found 5 days agoSee prices for these datesEvery date in April 2027
May 2027From $1922 departure dates18 May 2027 – 21 May 2027 · found 7 days agoSee prices for these dates

One-way

In December 2026, the cheapest one-way fare on each of 26 departure dates is usually $24 to $41. Across all 89 departure dates we hold on this route, it is usually $26 to $85. Of the 7 months with enough one-way fares to compare, 1 is usually cheaper than December 2026.

Cheapest one-way found recently

$20

22 Dec · Jeju Air

Jeju International Airport (CJU) → Gimpo International Airport (GMP)

nonstop

found 2 days ago

Open this tripCheck today's price

It is also the cheapest one-way we hold, of any age.

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
22 Dec$20Jeju Airnonstopfound 2 days agoOpen this trip
1 Dec$22T'way Airnonstopfound 2 days agoOpen this trip
2 Dec$22T'way Airnonstopfound 2 days agoOpen this trip
8 Dec$22Eastar Jetnonstopfound 5 days agoOpen this trip
9 Dec$23T'way Airnonstopfound 3 days agoOpen this trip

Every date we hold

26 departure dates

1 Dec: $22, found 2 days ago2 Dec: $22, found 2 days ago3 Dec: $24, found 4 days ago4 Dec: $24, found 2 days ago5 Dec: $34, found 2 days ago6 Dec: $42, found 2 days ago8 Dec: $22, found 5 days ago9 Dec: $23, found 3 days ago10 Dec: $24, found 5 days ago11 Dec: $26, found 7 days ago12 Dec: $28, found 2 days ago13 Dec: $42, found 5 days ago14 Dec: $35, found 5 days ago15 Dec: $25, found 4 days ago16 Dec: $24, found 2 days ago17 Dec: $27, found 6 days ago18 Dec: $23, found 2 days ago20 Dec: $49, found 2 days ago22 Dec: $20, found 2 days ago24 Dec: $35, found 7 days ago25 Dec: $55, found 4 days ago26 Dec: $77, found 4 days ago27 Dec: $83, found 4 days ago28 Dec: $65, found 2 days ago29 Dec: $37, found 4 days ago30 Dec: $38, found 3 days agoDec
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
1 Dec$22T'way AirJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 2 days agoOpen this trip
2 Dec$22T'way AirJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 2 days agoOpen this trip
3 Dec$24Jeju AirJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 4 days agoOpen this trip
4 Dec$24T'way AirJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 2 days agoOpen this trip
5 Dec$34Air SeoulJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 2 days agoOpen this trip
6 Dec$42Eastar JetJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 2 days agoOpen this trip
8 Dec$22Eastar JetJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 5 days agoOpen this trip
9 Dec$23T'way AirJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 3 days agoOpen this trip
10 Dec$24Air SeoulJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 5 days agoOpen this trip
11 Dec$26Eastar JetJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 7 days agoOpen this trip
12 Dec$28Air BusanJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 2 days agoOpen this trip
13 Dec$42T'way AirJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 5 days agoOpen this trip
14 Dec$35Eastar JetJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 5 days agoOpen this trip
15 Dec$25Jeju AirJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 4 days agoOpen this trip
16 Dec$24Jeju AirJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 2 days agoOpen this trip
17 Dec$27Air BusanJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 6 days agoOpen this trip
18 Dec$23Jeju AirJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 2 days agoOpen this trip
20 Dec$49Air SeoulJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 2 days agoOpen this trip
22 Dec$20Jeju AirJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 2 days agoOpen this trip
24 Dec$35Parata AirJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 7 days agoOpen this trip
25 Dec$55Air BusanJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 4 days agoOpen this trip
26 Dec$77Air BusanJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 4 days agoOpen this trip
27 Dec$83Air SeoulJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 4 days agoOpen this trip
28 Dec$65Air SeoulJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 2 days agoOpen this trip
29 Dec$37Air SeoulJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 4 days agoOpen this trip
30 Dec$38Air SeoulJeju International Airport (CJU) → Gimpo International Airport (GMP)nonstopfound 3 days agoOpen this trip

Which month looks cheapest?

December 2026 is the cheapest month — from $20.

November 2026From $2311 departure dates19 Nov · found 4 days agoOpen this tripEvery date in November 2026
December 2026From $20Cheapest seen26 departure dates22 Dec · found 2 days agoOpen this trip
January 2027From $2313 departure dates15 Jan 2027 · found 3 days agoOpen this tripEvery date in January 2027
February 2027From $522 departure dates22 Feb 2027 · found 6 days agoOpen this trip
March 2027From $2414 departure dates11 Mar 2027 · found 2 days agoOpen this tripEvery date in March 2027
April 2027From $8510 departure dates27 Apr 2027 · found 3 days agoOpen this tripEvery date in April 2027
May 2027From $805 departure dates10 May 2027 · found 7 days agoOpen this trip
June 2027From $895 departure dates1 Jun 2027 · found 6 days agoOpen this trip
July 2027From $1001 departure date9 Jul 2027 · found 3 days agoOpen this trip
September 2027From $851 departure date1 Sept 2027 · found 3 days agoOpen this trip
October 2027From $1011 departure date17 Oct 2027 · found yesterdayOpen this trip

Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work