Originally Posted by RealHJ

It may not be all DL. For quite a few years it was, it would appear at least, KE blocking KE51/52 and 53/54 flights (HNL-ICN, both of the daily flights) availability to other SkyTeam airlines, including Delta. Only KE1/2 (HNL-NRT) was available (but then as that was the only flight available, DL blocked KE to KE connections at NRT). Now it has come back just recently, but very rarely.

So for specific flight blocking, and other KE blocking (like Fri-Sun flights that are often all blocked out across the board all 331 days up, with only Mon-Thu available - on certain routes), it is not necessarily DL and could be KE.

The routing rules is clearly DL, but the specific flight blocking (if direct flight search shows nothing) could be - and likely is - KE. Only way to really know is check availability via other ST airlines.. 2X and 1O per flight (ever) KE is very firm on SkyTeam and all partners wide. Only SkyPass members get greater availability than that.

KE blackout dates also is all DL blocking, however, and not KE. Those flights are wide open to DL.

But specific flight blocking, and possibly also day of week (Fri-Sun) blocking, I do believe could be KE.