Originally Posted by
skimthetrees
There are a few potential options to transfer Amex points to partners. You can book Korean through Delta but good luck finding business availability on Korean. You might have better luck searching Air Canada (Star Alliance including Asiana, and Amex can transfer to AC), although not much available from JFK on Asiana. Seems to be a few more options from the west coast, SFO, LAX.
You can also book KE through AF/KL Flying Blue. Just did that the other day SEA-ICN. Transfer partner from many programs including AMEX.