Originally Posted by
naverending
I originally booked round ticket between US and South Korea then I decided to visit Saipan while I am visiting South Korea. So it's two different round tickets. One for between US and South Korea and one for between South Korea and Saipan but both are by Korean air not by American Airline. That's why I am questioning.
There should be no problem, since you will have multi-day layovers in Korea in each direction.
If you were only planning to be in Korea for a few hours, that would be a problem -- but for the airline, not you.