• Delta Air Lines average operating margin for 2023 was 9.09%, a 33.09% increase from 2022.
• Delta Air Lines average operating margin for 2022 was 6.83%, a 119.56% increase from 2021.
• Delta Air Lines average operating margin for 2021 was -34.91%, a 29.11% decline from 2020.

Operating margin can be defined as operating margin measurement of what proportion of a company's revenue is left over after paying for variable costs of production such as wages, raw materials, etc.