It really it isn't vital, but over my past few flights, I have had segments on NW-coded flights on CO. The confirmation number on CO is different than the confirmation number on NW. Is there anyway to find the corresponding CO confirmation number for your NW flight so that you can check in? I am a little unfamilar with the CO kiosk, but I know it will allow you to check in with by confirmation number. I know it won't allow you to check in on nwa.com when your first segment is a CO-operated flight, and rather than take the chance of waiting in line at the ticket counter, it would be nice to do it on the kiosk.