Not sure if there are any quarantine rules still in place in Korea. In Dec of 2020 I had to quarantine for 14 days there. Back then I paid $800 one way from the East Coast. 2 or 3 days to recover from jet lag. I wouldn't go half way around the world for only a week. Paid $1k one way to VN this time in Jan. Only 3 day quarantine. But I am here for 6 months. Soon they will end any kind of quarantine here. But can't get here without vaccine.... Probably the same for Korea....