I purchased SAS tickets from PHX-LAX-CPT in Nov for July travel. During purchase process I enter my Skymiles number with no problem. Flights from/to PHX from LAX are DL flights. Low and behold 3 days later the whole itinerary shows up on my Delta Skylmiles account as a future trip. I expect no issues with credits from DL. I will ask for and save printed boarding passes just in case.