[edit] Delta Official

https://www.delta.com/content/www/en_US/skymiles/earn-miles/earn-miles-with-delta.html

[edit] Good One

http://cwsi.net/delta.htm

[edit] Medallion Upgrade Priority Calculator

http://cwsi.net/mupc/

Medallion Upgrade Priority Calculator (MUPC) http://cwsi.net/mupc/default.aspx?status=DM&fare=X

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