Complimentary upgrades on Delta Air Lines
Upgrading to Premium Cabins (Delta Premium Select / Delta One)
- There are no cabins of service higher than Delta One.
Official upgrade rules found on Delta.com.
Mileage Upgrade Awards (MUA) changes (as of 08/22/2023)
- It is unlikely to see buy up offers or MUAs because the ticketed fare class is the highest cabin of service available, but Delta’s IT has been know to do shady, illogical things like sell you a buy-up to a refundable fare in the same cabin.
Official mileage upgrade awards rules found on Delta.com
