I just got off the phone with Delta...all Northwest flights after Feb 1st are being switched to Delta flight #s and you have to log onto their site...the reasons my NW seats aren't showing up on Delta is because they're Jan 28 flights and she said they're still in the process of merging and if it's on the NWA reservation, not to worry. Sounds like a mess! As long as DD4 gets to sit and look out the window I'll be happy...I tend to get sick looking out the window! I'll sit in the middle this time...