From Incheon International Airport (ICN)
1. Airport Limousine bus directyly from ICN to Jeonju express bus terminal https://www.airport.kr/ap/en/tpt/busRouteList.do (Jeonju belongs to Jeolla province.)
2. KTX bullet train from Yongsan station to Jeonju station
Step i) Take an airport train directly to Seoul station (https://www.airportrailroad.com/co/main.do)
If you are lucky, you can catch a train directly from Seoul station to Jeonju station. But there are not many direct trains.
Step ii) Move to Yongsan station by subway line number 1 (dark blue line) which is just 2 stops south from Seoul station.
When you step down to the subway platform, take any trains arriving on your right.
Step iii) Take KTX bullet train which takes about 1 hour and 40 minutes from Yongsan.
Please book your train on https://www.letskorail.com/ebizbf/EbizbfForeign_pr16100.do?gubun=1 before your arrival.
Sometimes (in particular during the weekends), it is extremely challenging to book a seat.
3. Express bus from Seoul express bus terminal to Jeonju express bus terminal
Step i) Take an airport train to any subway stations in Seoul.
Step ii) Take subway line number 3 (orange), number 7 (olive green) or number 9 (gold) to Express Bus Terminal station.
It is super easy to take a subway and transfer to any lines in Seoul.
Step iii) Take an express bus (Honam line) which takes about 3 hours.
You can book your bus on https://www.kobus.co.kr/main.do .
Unlike KTX, you can find many seats vacant. If you are lucky, try a premium bus which is just like a business class. :)
From Gimpo International Airport (GMP)
1. KTX bullet train from Yongsan station to Jeonju station
Step i) Take subway line number 9 (gold) to Noryangjin station and transfer to line number 1 (dark blue) to Yongsan station.
https://seoul.exploremetro.com/en/pedia/line/9/
Yongsan station is just one stop north from Noryangjin station and you can cross Han river!
Step ii) Take KTX bullet train which takes about 1 hour and 40 minutes from Yongsan.
Please book your train on https://www.letskorail.com/ebizbf/EbizbfForeign_pr16100.do?gubun=1 before your arrival.
Sometimes (in particular during the weekends), it is extremely challenging to book a seat.
2. Express bus from Seoul express bus terminal to Jeonju express bus terminal
Step i) Take subway line number 9 (gold line) to Express Bus Terminal station.
https://seoul.exploremetro.com/en/pedia/line/9/
Step ii) Take an express bus (Honam line) which takes about 3 hours.
You can book your bus on https://www.kobus.co.kr/main.do .
Unlike KTX, you can find many seats vacant. If you are lucky, try a premium bus which is just like a business class. :)
Transportation within Jeonju city
Compared to the big Korean cities such as Seoul and Busan, Jeonju is a small city and everywhere is within about 20-30 minute reach by car. Please take a taxi and ask the driver to go to
전북대학교 훈산건지 하우스 (guest house)
전북대학교 자연과학대학 5호관 물리학과 (Department of Physics)
Jeonju creek (upper) and Hanbyeok-gul tunnel (right) nearby Hanok village.
You may watch a K-drama: 25 and 21.