Originally Posted by
BenA
Fwiw, my experience has been that KL will only put you on their own metal by default. Be prepared to push back and specifically ask for the OK flight, and if the KL agents at the airport refuse, Skype call the Diamond line instead and try your luck with Delta (who should be much more willing to help.)
Not always the case. Last fall I was on a KL ticket (and KL metal) and had a misconnect at AMS. The airport agents very willingly put me on a DL flight instead.
Traveling on a DL award ticket, I assume YMMV.