Join Date: Dec 2002
Location: Pleasant Prairie, WI USA DL FO (until 2/04), NW silver '03, NW gold '04+'05 Plat '06+ (thanks, Leo!), DL SkyClub
Programs: DL Plat/ Million Miler, AS, Hilton, Marriott Bonvoy, Piggly Wiggly Pig Points
Posts: 2,265
Often there are significant issues interfacing between NW and CO on codeshare flights. I had a problem once at BWI flying CO metal on a NW ticket that exasperated the CO agents to the point that they actually summoned the NW supervisor over. It took a half hour to get boarding passes.