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Making the skies greener. Aviation’s seal of integrity, precision and insight.

The leader in aircraft and flight emissions data

Discover a unique and unparalleled methodology, data, and analytics.

Understand the impact of every flight

EmeraldSkyTM delivers unparalleled accuracy, providing exceptional historical and forecasted flight emissions data. Developed by Cirium®, part of LexisNexis® Risk Solutions, a RELX business, it represents the perfect fusion of data, analytics, and detailed methodology. EmeraldSky offers a precise and comprehensive perspective on aircraft and flight CO2 emissions as well as fuel consumption for every flight and aircraft.

Listen In: Cirium CEO, Jeremy Bowen, on the power of Flight and Aircraft Emissions insights. LISTEN TO THE SIMPLIFLYING PODCAST

Learn about the detailed methodology used to calculate Flight Emissions


Deliver on sustainability promises with the most accurate, historic and forecasted emissions data in air travel and transport.

Cirium data provides clear insights into an organization’s aircraft and flight emissions footprint to help make informed decisions when choosing flights and equipment.

Fly informed
with Cirium

Trusted market leader green-s

Trusted market leader

Cirium data is independent, verified and trusted. Our continuous investment in innovation propels the industry towards achieving its net-zero sustainability objectives.

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Unmatched industry expertise

With decades of deep industry knowledge and unparalleled experience, Cirium takes a consultative approach to sustainability. We provide unbiased insights into operations. We help identify opportunities, recommend solutions and help implement them across your organization.

Cirium emissions partnerships
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When the right partnership matters

Discover how you can harness comprehensive historic and forecasted aircraft and flight emissions. Deliver elevated environmental insights, optimized travel and offset costs, and enhance regulatory compliance to your customers by partnering with Cirium. 

Enhance disclosure of environmental emissions, streamline travel and aircraft fleet planning

Powered by EmeraldSky, accurate, precise, and accessible emissions data is available across Cirium products and is a key component for today’s and future aviation analytics solutions.

Create a custom view of business travel emissions
Providing emissions insights is becoming a key element to ESG Reporting. Corporations can collaborate with Cirium Blu – Flight Emissions to generate bespoke sustainability and ESG insights and use this to inform reduction strategies. 

Offer forecasted CO2 emissions for flights – at the time of booking
Integrate the Cirium Sky Emissions API with booking tools to provide predicted emissions estimates on schedule flights for each seat in a specific cabin. Enable swift decision making at the point of travel shopping to meet traveler expectations for environment-conscious booking.

Weave emissions data into analysis and strategic planning
Fuse emissions data with other datasets as part of Cirium Sky Warehouse and improve strategic decision making around the carbon footprint of operations, drive operational excellence to help reduce emissions and identify new opportunities to support ESG initiatives.

Monitor the CO2 emissions of a portfolio of aircraft
Create a custom aircraft portfolio with Cirium Ascend Risk Analytics to monitor and analyze the emissions footprint of the aircraft and portfolio and include this in ESG reporting. Scenario model by replacing old aircraft with new more fuel efficient aircraft and compare multiple portfolios.


A consultative approach
to sustainability

Wherever you are on your sustainability journey,
Cirium can help you reach your goals. 

    Cirium is a tradename of LexisNexis Risk Solutions.

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