Our journey to Jeju was slightly arduous, but it was all worth it, eventually.
Arriving in Jeju from Gwangju
From the Nongseong (농성) Bus Terminal, we walked about 15 min to the Nongseong Metro where we bought a ticket (1200 won) to the airport. The ride to the Airport Station is about 15 mins. From there, walk another 10 to 15 mins to reach Gwangju Airport.
My memory is fuzzy now, but according to my notes, the details of my journey to the Nongseong Metro are as such:
Go through exit 6 of Shinsaegae (신세계) department store, go in the direction of the e-mart at Geumho building. Cross the road at g25 convenience shop, continue straight for another 5 to 10 min before arriving at Nongseong Metro Station. Add time if lugging luggage.