Photo: Shutterstock The International Air Transport Association (IATA) is urging the aviation industry to adopt a single global standard for calculating and displaying flight emissions, warning that inconsistent information is leaving travelers confused when comparing flights.
In a newly published opinion piece, IATA Director General Willie Walsh said passengers are increasingly considering the environmental impact of their journeys, but the emissions data presented by airlines, booking platforms, and third-party websites often varies significantly depending on the methodology used.
Photo: ShutterstockAccording to Walsh, two people searching for the same flight on different platforms can receive different carbon footprint estimates, making it difficult for travelers to make informed decisions. He argued that without a standardized approach, sustainability information risks becoming misleading rather than helpful.
"People deserve clear, consistent, and credible information when they book a flight," Walsh wrote, adding that the industry has a responsibility to ensure emissions figures are calculated using common principles.
IATA believes the solution lies in wider adoption of a unified methodology developed through the International Civil Aviation Organization (ICAO), which has already established guidance for calculating CO2 emissions from commercial flights. The organization says broader implementation would improve transparency across the aviation ecosystem and create a level playing field for airlines and travel companies.
The issue comes as environmental considerations continue to play a larger role in travel decisions. Many online booking platforms now display estimated carbon emissions alongside ticket prices and flight durations, while airlines are increasingly highlighting investments in sustainable aviation fuel like the recent Air Canada-Airbus partnership, newer aircraft, and operational efficiencies to reduce their environmental footprint.
However, IATA argues that the usefulness of this information depends on consistency. Different assumptions regarding aircraft type, passenger load factors, cargo allocation, and fuel consumption can all lead to varying emissions estimates for the same itinerary.
Walsh also cautioned against creating a fragmented system where consumers are presented with conflicting sustainability claims. Instead, he called for collaboration across airlines, travel agencies, technology providers, and regulators to ensure travelers receive reliable and comparable emissions data regardless of where they book.
As the aviation industry faces growing scrutiny over its environmental impact, IATA says standardizing emissions information is a necessary step toward building trust with consumers and supporting more transparent travel choices.