Originally Posted by
Teal
I'm taking my first Northwest flight ever in a couple of weeks and I have some old unexpired Skymiles (SO and I fly United 95% of the time) and I was curious to find out if I can use them to upgrade but I can't find any info. I'm assuming that this is impossible. Am I correct?
I think the only programs you can use to upgrade on NW are NW, CO, and AS. AFAIK NW members cannot upgrade DL flights and DL members cannot upgrade NW flights (but if I'm mistaken I would certainly love to be told so...)