Originally Posted by
MarkXS
Book on Delta.com to avoid the current Delta IT bug where some NW-issued tickets for DL flights can't do OLCI or kiosk check-in.
Put your NW# on the reservation at delta.com. As of about a month or so ago delta.com lets you add/change FF#s for its partners.
Upgrades will be based on your NW Platinum status for you and Gold for companion.
Put all the 2009 DL and NW trips into one program, DL or NW, not both. Given you have NW status now, you'll get the RDM bonus for the DL flights, which you would not get if you credited them to your non-status DL account.
That did not work for me, and I am not sure OP can get around it. Booked CLT-LAS on DL.COM all DL metal. Could not do OLCI. I believe that if you get upgraded (as I was) that screws OLCI up and right now there is no fix. Reminds me of my former firm's technology update of a few years back where the motto was "Temporarily inconvenienced to be permanently improved."
Safe Travels!