According to Delta Upgrade to First Class guidelines, all the tiers and levels of Medallion Club members are eligible to receive a free upgraded upgrade from first-class as well as Comfort Plus on an extensive variety of routes.
Delta Upgrade to First Class
In addition, Medallion top members are entitled to free upgrade up to Delta One class of service for flights within the U.S as well as Hawaii.
Although it is important to be aware of the details below, it’s important to focus on the fact that the airline is actively selling more First Class upgrades.
The model of revenue amplification is offering upgraded Delta seats up to First Class in a way that encourages more customers to book them. And according to annual revenue reports the company continues to sell an increasing amount of its forward lodges instead of offering it as an upgrade. This is evident when you make an airline ticket and ask for an upgrade up to First Class.
However, the more expensive cabins the airline offers more seats are available to Delta complimentary upgrades for First Class.