Originally Posted by
STBCypriot
I'd tried to do something similar recently (booking a KLM or AF flight operated by CY) and was told the same thing by DL. It appears that the flight has to be operated by a DL partner (it has to be DL partner metal).
Most of the cases yes. There are instances where AF has a hard block and treats is as entirely their inventory for revenue and awards.
You can book "AF" flight HEL-CDG that is operate by Finnair using SkyMiles. Been there done tat