Getting "bumped" or upgraded to Delta One, Delta's premier business class product, is primarily reserved for the airline's most loyal customers. To receive a complimentary upgrade, you generally must be a Medallion Member (Silver, Gold, Platinum, or Diamond) and be flying on a route where Delta One is offered as a domestic product, such as select cross-country flights between New York-JFK and Los Angeles or San Francisco. For international long-haul flights, complimentary upgrades to Delta One are not standard; instead, Diamond and Platinum members must use Global Upgrade Certificates or Regional Upgrade Certificates to secure a seat. Another path is through the Delta SkyMiles Reserve American Express Card, which places cardholders on the upgrade list behind Medallion members. In rare cases of "operational upgrades," where the Main Cabin is oversold but Delta One has empty seats, the airline may move high-status passengers up to balance the load. However, the most reliable way in 2026 remains monitoring the "My Trips" section of the Fly Delta app for "Mileage Upgrade Awards" or discounted cash offers, which often appear closer to the departure date.