Originally Posted by mosburger
There should be loads of Korean travel agencies in NYC offering Jeju package tours. It's the number one holiday destination in Korea by far and you have something like 20 daily scheduled flights there from Seoul alone. Please do remember that there are also direct flights at least from Osaka, Tokyo, Beijing, Shanghai and Hongkong to Jeju. It's not necessary to fly to Seoul first to get there.
I can't say about other things due to lack of knowledge, however in speaking of daily flights between Seoul and Jeju, I believe there are at least 70 flights each way. I see that Asiana has 30 flights, and I assume that Korean Air has more flights than Asiana.