Originally Posted by
MSPeconomist
DL gives a lounge membership to its DMs (Diamond: 125,000 status miles AND $15,000 spend on fares). Its AmEx Reserve card (approximately $500 annual fee) or the regular AmEx Platinum or Centurion charge card gives DL lounge access when flying DL the same day.
Per my understanding, and according to Delta's website with lounge access policies, this option has been changed, you don't get free access from its Reserve card anymore
http://www.delta.com/content/www/en_...-of-terms.html it's $29 per person per visit now.