Originally Posted by BF263533

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If you fly on a Northwest aircraft, you will have a much better chance for an elite upgrade because Northwest has a percentage of first class seats. For example, 8% of Delta's MD-90's seats are first class, while 16% of Northwest's DC-9-30's seats are first class. Unfortunately this generous upgrade plane is headed to extinction.

I avoid Delta's 767-300s which have a 9.86%, and always try for the 757-200 which can go as high as 14.13%.