December is by far the best month, wherein you can get cheapest flights for Cheju to Seoul. Meanwhile, December is perceived as the expensive month due to the varying factors. That’s why it’s highly advised to make advanced online flight booking to save huge amounts of money.
December- During this month the footfall is less so, the flight is gradually inexpensive.
December - is the cheapest month to book round trip flights.
Disclaimer - All the mentioned fares were found within last 48 hrs. The displayed fares are based on historical data and are subject to change. The fares cannot be guaranteed at the time of booking.

CJU
08:45
Cheju Jeju International Airport
Sat , 29 Nov 2025

GMP
10:00
Seoul Gimpo International Airport
Sat, 29 Nov 2025

CJU
08:45
Cheju Jeju International Airport
Tue , 02 Dec 2025

GMP
10:00
Seoul Gimpo International Airport
Tue, 02 Dec 2025

CJU
07:10
Cheju Jeju International Airport
Sun , 30 Nov 2025

GMP
08:25
Seoul Gimpo International Airport
Sun, 30 Nov 2025

CJU
06:25
Cheju Jeju International Airport
Sat , 29 Nov 2025

GMP
07:40
Seoul Gimpo International Airport
Sat, 29 Nov 2025

CJU
06:25
Cheju Jeju International Airport
Tue , 02 Dec 2025

GMP
07:40
Seoul Gimpo International Airport
Tue, 02 Dec 2025

CJU
06:20
Cheju Jeju International Airport
Sun , 30 Nov 2025

GMP
07:35
Seoul Gimpo International Airport
Sun, 30 Nov 2025

CJU
06:05
Cheju Jeju International Airport
Sat , 29 Nov 2025

GMP
07:20
Seoul Gimpo International Airport
Sat, 29 Nov 2025

CJU
06:05
Cheju Jeju International Airport
Tue , 02 Dec 2025

GMP
07:20
Seoul Gimpo International Airport
Tue, 02 Dec 2025

CJU
06:05
Cheju Jeju International Airport
Sun , 30 Nov 2025

GMP
07:20
Seoul Gimpo International Airport
Sun, 30 Nov 2025










To crack the better offer on Cheju to Seoul flights, it’s better to make advanced bookings at least few weeks prior of your intended date because price might rise eventually due to the delay.
Weekdays are the best day to get low-cost flight tickets from Cheju to Seoul. However, it depends on a certain factor. If the demand is high and festivals are there, then prices could be a little high.