Hi...just back from Seoul this morning. Wanna share my experience to those going to Jeju. Always safer to buy air ticket from airline with bigger plane e.g. 737-400 above especially when there's extremely windy condition in Jeju. My flight from Jeju to Busan apparently got cancelled due to strong wind condition on that day. Was told that all possible flights out of Jeju was taken up on the same day. Luckily a ground staff of a bigger airline had an initiative to find 2 available tickets for me and my wife. Really thank you for her effort...else will be stranded in Jeju for another 2 days. 1 minus point in Jeju airport despite being an international airport, their announcements all in Korean.

I took JejuAir...their fleets are 737-800...if the wind not strong should be OK.

Not sure if typhoon or not. All announcement in Korean...