I signed up with Northwest in 1989 when I got a job that required me to fly quite a bit between Seattle and Detroit and Seattle and New England. After leaving that company I worked primarily along the west coast between San Diego and Anchorage until late last year. Alaska Airlines was a natural choice due to route structure and the tie-in between the NW and AS programs. Many of my family and in-laws live in the Eastern US so I use NW to visit them as well.
About two years ago, I got very disgusted with NW and tried United. Very pleased. Lots of new planes, many choices for connecting cities and flights, more bonus opportunities to earn miles and generally a more helpful staff. Depending on my next work project, I am inclined to focus my business with United if I have a choice.
I got to try Delta last month on a transcontinental journey and ranked them as very average.
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[This message has been edited by MileageAddict (edited 01-20-2000).]