You can use miles to upgrade to Delta One®, Delta Premium Select, First Class or Delta Comfort+® for eligible flights within the U.S. 50 while purchasing a ticket* either at delta.com or with Delta Reservations. If your reservation is eligible for an upgrade, you'll see the option to upgrade in your Trip Summary.

Yes, you can use Delta SkyMiles to upgrade your seat to First Class (or Delta One/Premium Select) through a few different methods. The most common way is the Mileage Upgrade Award, which allows you to use miles to move up a cabin after you have already purchased a ticket. You can also use "Miles as Cash" during the checkout process to pay for a higher fare class entirely. Another popular option is the "Upgrade with Miles" feature found within the Delta Fly App or on their website under "Trip My Trips"; if an upgrade is available, you will see a price in both dollars and miles. It is important to note that not all fare classes are eligible; deeply discounted "Basic Economy" (E class) tickets typically cannot be upgraded with miles. The "value" of your miles when used for upgrades is generally around 1 cent per mile, though this varies. In 2026, Delta has streamlined this process, allowing Diamond and Platinum Medallion members to use their "Choice Benefits" to apply Global or Regional Upgrade Certificates digitally, which can sometimes be combined with miles for even better positioning on the standby list.