Korean Air (KE) is a SkyTeam member based at Seoul Incheon (ICN). It runs one of the best-connected hubs in Asia and is in the process of absorbing Asiana Airlines, which will make it larger still. One rule to know: Korean Air keeps First class for its own SKYPASS members, so partners should target business class, branded Prestige.

The easiest partner search is on delta.com. Log in or create a free SkyMiles account, and select Shop with Miles in the flight search.
Search routes touching Seoul Incheon (ICN), like LAX-ICN, JFK-ICN, or ICN-BKK. Delta shows Korean Air flights it can book with SkyMiles alongside its own.
Cross-check on koreanair.com with a free SKYPASS account, which shows the fullest picture of Korean Air’s own award space, and on Air France/KLM’s Flying Blue site, another SkyTeam program that books Korean Air.
Book with the SkyTeam program your miles live in: Delta SkyMiles, Flying Blue, or Korean’s own SKYPASS. SKYPASS often has the best award rates and is a transfer partner of major bank points programs.