2024 U.S.-Booked Air Volume: $82.5 million
Consolidated U.S. TMC: BCD
Siemens’ spend on U.S.-booked air travel fell in 2024 to $82.5 million, according to a BTN estimate.
Worldwide, the company has 312,000 employees in 190 countries. Siemens’ business travel-related emissions grew slightly from 218,000 metric tons of CO2 equivalent (on a restated basis) in 2023 to 221,000 metric tons in 2024.
The technology and engineering company has launched multiple initiatives to reduce this figure. The sustainability report noted that Siemens joined, and budgeted for, the corporate SAF alternative aviation fuel purchasing program operated by Air France-KLM. In Switzerland, Siemens has introduced an internal levy of 70 Swiss francs per metric ton of CO2 equivalent for unavoidable business travel by air. The fee is added to the ticket price and is intended to have a steering effect. Money raised from the levy is used to purchase certified alternative aviation fuel.
In November 2024, BCD Travel announced Siemens as its pilot customer for a partnership with sustainability management technology provider Squake, including “active nudging and steering tools through online booking tools and agent interactions,” such as displaying carbon cost of each trip at point of sale.
BTN reported in September 2025 that Siemens has enhanced its adoption of HRS’ Green Stay Initiative, for which Siemens was the pilot customer in 2021. As of August 2025, 90 percent of Siemens’ preferred hotel suppliers submit figures to HRS on their carbon emissions and water and waste consumption. Properties meeting specified targets are designated as Green Stay in Siemens’ booking tool, and those with exceptional performance are labeled Green Stay Champions.
Worldwide revenue for Siemens in the year to September 2024 increased 3 percent year over year to €75.9 billion. In August 2025, the company said it expects comparable revenue growth of 3 percent to 7 percent for the year to September 2025.