No, simply holding a Delta SkyMiles American Express card will not automatically grant you Diamond Medallion status, but it provides a massive "headstart" and "boost." As of 2026, Diamond Status requires $28,000 MQDs (Medallion Qualification Dollars). A Delta Platinum or Reserve card gives you an automatic $2,500 MQD "Headstart" each year just for holding the card. Additionally, you earn "MQD Boosts" on your daily spending: the Delta Reserve earns $1 MQD for every $10 spent, while the Delta Platinum earns $1 MQD for every $20 spent. To reach Diamond purely through spending on a Reserve card (without flying at all), you would need to spend $255,000 in a year ($28,000 target - $2,500 headstart = $25,500 needed, multiplied by 10). While the cards make the path significantly easier, Diamond remains a "high-tier" status reserved for the biggest spenders and most frequent flyers.