Nice sale with Delta for travel from Barcelona to San Francisco. You can book these as KLM/Air France codeshares which increase the earned MQDs and MQMs.
BCN-SFO would earn 19251 MQMs 5134 MQDs 4.13 MQD Ratio while Delta Diamond members would obtain 56470 RDMs, Platinum 46202 RDMs, Gold 41069 RDMs, Silver 35935 RDMs, Base 25668 RDMs
Delta Boeing 757 Business Class
Delta Boeing 767 Business Class