The index allows travel buyers to favour environmentally-friendly aircraft operators when booking flights, and the 4Air relationship provides independent verification of sustainability impacts.

4Air's Regulatory Monitoring & Compliance Programme helps operators monitor their obligations to emissions reporting requirements, as well as SAF claims, and to fulfil them so as to be flying compliant.

Customers can be confident that the HF120 engine can help them meet their sustainability goals to reduce CO2 emissions in flight, and can sign up to 4Air's carbon offset programmes to reduce their overall footprint.