Originally Posted by
MegatopLover
This recent thread tried and failed to supply a definitive answer to that question. As yet, no one on these boards knows for sure.
Well, funny enough, I just called the KE Singapore office, and asked her to try and buy a OW BKK-ICN in F. Guess what? Even though no booking engine can sell F, she said she could! I even asked what booking code, and her answer was, "F".
Mysterious!