During my next vacation in Korea I wanted to visit Jeju as well. My itinerary is as follows:
- Entry through Incheon Airport (as last time)
- Flight from Seoul/Gimpo to Jeju a few days later
- Flight from Jeju to Busan/Gimhae
- Exit through Incheon Airport
My passport grants me visa exemption and last time I got a sticker inside which shows where I got into the country and my status (B-1).
Can I freely use the domestic flights to Jeju and back or could there be any problems? I did read somewhere that the island is a special jurisdiction.