Mercedes Mullins
Delta Air Lines is a leading global airline that operates more than 5,000 flights daily, serving over 350 airports worldwide. With such an extensive operation, jet fuel is critical to Delta's performance, and the airline consumes approximately 4 billion gallons of jet fuel annually. Optimizing fuel usage and transitioning to more sustainable practices are key focuses for Delta, which has implemented several strategies to reduce fuel consumption and decrease its environmental footprint. This paragraph introduces the topic of Delta's jet fuel usage, highlighting its significance, the airline's consumption levels, and its efforts toward sustainability.
| Characteristics | Values |
|---|---|
| Amount of jet fuel used per year | 3.9 billion gallons |
| Amount of jet fuel used per year (2024 estimate) | 4 billion gallons |
| Amount of jet fuel used per year (2025 estimate) | 4.1 billion gallons |
| Amount of jet fuel saved through operational improvements | 45 million gallons |
| Amount of jet fuel saved through enhanced landing procedures | 1 million gallons per year |
| Amount of jet fuel saved through fleet renewal and optimization efforts | 44 million gallons in 2024 |
| Amount of jet fuel saved through retrofitting existing fleet | 3 million gallons (expected by the end of 2025) |
| Percentage improvement in fleet-wide fuel efficiency (2019-2024) | 6.6% |
| Percentage improvement in fuel efficiency per seat mile for new aircraft (2019-2024) | 28% |
| Target percentage of Sustainable Aviation Fuel (SAF) use by 2030 | 10% |
| Percentage improvement in fuel efficiency for aircraft designed in partnership with JetZero | 50% |
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What You'll Learn
Delta's annual fuel consumption
Delta Air Lines has a strong focus on sustainability and is committed to connecting the world to a more sustainable future of travel. The airline has set an ambitious goal of achieving net-zero carbon emissions by 2050 for its operations. To reach this goal, Delta is working on improving the efficiency of its fleet, innovating aircraft operations, and increasing the use of Sustainable Aviation Fuel (SAF).
In its annual report filed with the United States Securities and Exchange Commission (SEC) in February 2025, Delta Air Lines disclosed its fuel consumption for the previous years. In 2024, the airline consumed $4.1 billion worth of fuel (in gallons), compared to $3.9 billion in 2023 and $3.4 billion in 2022. However, it is important to note that the fuel costs can vary based on the growth of the airline's fleet. For example, in 2019, Delta Air Lines operated 1,062 aircraft, while in 2024, its fleet size increased to 1,292 aircraft.
Delta's focus on sustainability and fuel efficiency has led to significant improvements. Between 2019 and 2024, fleet renewal and optimization efforts resulted in a 6.6% improvement in fleet-wide fuel efficiency. In 2024 alone, Delta added 38 new aircraft to its fleet, which were, on average, 28% more fuel-efficient per seat mile than the retired aircraft. The airline has also invested in retrofitting its existing fleet with updated technologies, such as fitting split-scimitar winglets on its Boeing 737 Next Generation (NG) aircraft, further optimizing fuel consumption.
To reduce jet fuel consumption, Delta has implemented several innovative strategies. The airline utilizes "tankering," which involves loading more fuel at inexpensive airports to avoid consuming costlier fuel at high-cost stations. Additionally, Delta has a refinery in Trainer, Pennsylvania, which sends jet fuel via pipeline to New York, ensuring a steady fuel supply to one of its key cities. Delta also actively works on enhancing landing procedures and improving aircraft components, such as adding winglets and lightweight landing gear, to reduce fuel burn.
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Jet fuel distribution
Pipelines are considered the most cost-effective way to transport jet fuel over long distances. They facilitate the rapid and seamless delivery of fuel to airports and distribution centres. For example, Delta Airlines benefits from the Trainer refinery in Pennsylvania, which sends jet fuel through a pipeline to New York, ensuring a steady supply to one of its most important cities.
Waterways are also crucial for jet fuel distribution, especially for coastal airports and terminals. Ships and barges transport jet fuel in bulk to coastal regions, where it is then offloaded and distributed to nearby aviation facilities. This method is commonly used by fuel providers such as Sunoco LP to supply fuel to coastal airports.
Trucking jet fuel tends to be the most expensive method but is sometimes necessary to meet the demands of specific airports. Fuel suppliers like Sun Coast Resources offer state-of-the-art trucks to handle high-pressure deliveries, ensuring that jet fuel is delivered efficiently and on time.
Additionally, rail transport is another option for distributing jet fuel over land. This method allows for the transportation of jet fuel to inland locations and airports that are not directly accessible via pipelines or waterways.
The distribution process also involves submitting requests for proposals and negotiating contracts with jet fuel suppliers. Fuel suppliers like Associated Energy Group (AEG Fuels) provide jet fuel and support services to clients at over 3000 locations worldwide, demonstrating the global reach of the jet fuel distribution network.
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Fuel purchasing
Delta Air Lines uses about 3.9 billion gallons of jet fuel annually to power its 1,250 aircraft and more than 5,000 flights per day. The airline's fuel purchasing strategy has evolved in recent years, with a focus on cost-effectiveness and sustainability.
Delta's fuel purchasing process involves submitting requests for proposals and bidding to secure fuel supply contracts for each of the 350-plus airports it serves. The company considers the logistics and economics of each situation, including the availability of pipelines, ships, rail, and trucks for transportation. Pipelines are the most cost-effective method, while trucking is the most expensive. To optimize costs, Delta practices "tankering," loading more fuel at inexpensive airports to reduce consumption at high-cost stations.
The company also owns a refinery in Trainer, Pennsylvania, which supplies jet fuel to New York through a pipeline, ensuring a steady fuel supply to one of its key cities. Additionally, Delta has contracts with other refining companies to swap non-jet fuel products from Trainer for additional jet fuel.
Delta is committed to sustainability and aims to achieve net-zero carbon emissions by 2050. The airline is working to increase the use of Sustainable Aviation Fuel (SAF) and has set targets of 10% SAF usage by 2030 and 35% by 2035. To achieve these goals, Delta has signed oftake agreements and is actively securing additional agreements to meet its SAF goals.
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Sustainable Aviation Fuel (SAF) usage
Delta Airlines has been focusing on building a more sustainable future for travel. The airline uses about 3.9 billion gallons of jet fuel annually, and it has been working to optimize its fuel usage. Delta has achieved a significant milestone in its strategic sustainability roadmap by saving 45 million gallons of jet fuel through operational improvements. The airline has also been replacing retiring aircraft with next-generation models, which are 28% more fuel-efficient per seat-mile. These initiatives have saved approximately 44 million gallons of jet fuel in 2024 compared to 2019.
To achieve net-zero carbon emissions by 2050, Delta has adopted a multi-pronged approach. This includes improving fleet efficiency, innovating aircraft operations, and increasing the use of Sustainable Aviation Fuel (SAF). The airline has been transitioning to a more fuel-efficient fleet and enhancing operational efficiency to reduce jet fuel consumption. In 2023, Delta launched the Sustainable Skies Lab, focusing on research, design, and testing to drive progress toward its climate goals.
SAF is a liquid fuel currently used in commercial aviation that reduces CO2 emissions by up to 80%. It can be produced from various sources, including waste oils and fats, green and municipal waste, and non-food crops. SAF is also compatible with existing aircraft and infrastructure, as it can be blended with conventional jet fuel. ASTM standards outline the allowable percentages of SAF in blends with Jet A fuel.
The benefits of SAF extend beyond emissions reductions. Expanding domestic SAF production can create economic opportunities, such as jobs in the biofuel industry, and boost aircraft performance. Additionally, American farmers can earn more by providing feedstocks for SAF production during the off-seasons, while also improving their soil quality and reducing nutrient losses.
The aviation industry recognizes the potential of SAF in achieving sustainability goals. The Sustainable Aviation Fuel Grand Challenge aims to expand domestic consumption to 3 billion gallons by 2030 and 35 billion gallons by 2050 while reducing greenhouse gas emissions by at least 50%. Delta's efforts in scaling SAF usage have been acknowledged, with the airline being named one of Fast Company's Most Innovative Companies in 2024 and 2025.
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Fuel-saving initiatives
Delta Air Lines has implemented several fuel-saving initiatives as part of its sustainability commitment to achieve net-zero carbon emissions by 2050. Here are some key fuel-saving initiatives:
Fleet Improvements
Delta focuses on improving the fuel efficiency of its fleet by upgauging its planes and replacing retiring aircraft with next-generation models. Since 2019, the airline has added more fuel-efficient aircraft, with 38 delivered in 2024, that offer a 28% improvement in fuel efficiency per seat-mile compared to the planes they replaced. This initiative alone saved approximately 44 million gallons of jet fuel in 2024 compared to 2019.
Operational Efficiency
Delta optimises its fuel use through operational efficiency improvements. This includes better flight routing, onboard efficiencies, and the adoption of cutting-edge technologies. For example, Delta employs the Airbus fello'fly technique, inspired by migrating geese, and MicroTau's 'shark skin' addition to planes, both of which contribute to reduced fuel consumption. Additionally, Delta practices "tankering," loading more fuel at inexpensive airports to avoid consuming costlier fuel at high-cost stations.
Sustainable Aviation Fuel (SAF)
Delta recognises the importance of transitioning to Sustainable Aviation Fuel (SAF) to reduce carbon emissions. SAF, produced with bio-based feedstocks, can lower lifecycle carbon emissions by up to 80% compared to conventional jet fuel. Delta actively advocates for policies and collaborations that will increase the production and accessibility of SAF. The airline has partnered with JetZero to design a 50% more fuel-efficient aircraft, demonstrating its commitment to scaling SAF and driving innovation in sustainable aviation.
Innovative Partnerships
Delta launched the Delta Sustainable Skies Lab in 2023, a first-of-its-kind airline innovation lab. This lab focuses on research, design, and testing to accelerate progress toward the airline's climate goals. By collaborating with partners like JetZero, Delta aims to develop and scale new technologies that will reduce carbon emissions and drive sustainability in the aviation industry.
Through these fuel-saving initiatives, Delta Air Lines is taking a proactive approach to reducing its jet fuel consumption and working towards its goal of net-zero carbon emissions.
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Frequently asked questions
Delta uses approximately 4 billion gallons of jet fuel each year.
Delta has achieved a one percent fuel burn savings, or 45 million gallons of jet fuel, from operational improvements. The airline is also working on fleet renewal and optimization, which led to a 6.6% improvement in fleet-wide fuel efficiency between 2019 and 2024. Delta is also replacing retiring aircraft with next-gen models that are 28% more fuel-efficient per seat mile.
Delta's sustainability strategy focuses on improving the efficiency of its fleet, innovating aircraft operations, and increasing the use of Sustainable Aviation Fuel (SAF). The airline has set a goal of 10% SAF usage by 2030 and is collaborating with stakeholders to further incentivize SAF production.
In the short term, Delta is working to transition to a more fuel-efficient fleet and enhance operational efficiency. The airline is also working on enhanced landing procedures and adding enhanced winglets and lightweight landing gear to reduce fuel burn.
