Originally Posted by
LegalTender
Delta boarding pass scans are interfaced with SkyMiles and credits post as the flight is dispatched.
It's not complicated.
It's also true in the other direction: CO flights post faster to DL SkyMiles than to OnePass. This is for the same flight (Mrs. ralfp credited her DL acct) for an itin purchased on CO.com. DL posts within a day (IIRC), whereas CO takes a couple of days. KE also posts faster to DL than to CO. I doubt that the CO boarding pass scanners are interfaced with SkyMiles.