Jeonju to Seoul High-Speed Train
There are not many cheap and fast transportation options between Jeonju to Seoul, but if you're looking for a comfortable and fast mode of transportation, you should take the train. The trains from Korail and KTX run daily with Economy Class seats or Business Class seats for your convenience. It takes a mere 1 hour 48 minutes on average, so if time is of the essence this can be one option that does work out well! You can book the tickets online.
Rail.Ninja is an online ticket booking platform