Calculating CO₂ is not for the faint of heart. There are so many factors that it’s next to impossible for a traveller to figure it out. That’s why we teamed up with German non-profit atmosfair, one of the world’s leading climate consulting organisations, to develop the Least CO₂ sorter.
With the Least CO₂ sorter, you can immediately see how flights stack up environmentally. It shows the average amount of CO₂ emissions for all flight routes in your search result, plus how much each individual flight emits and how those compare to the average.
In routes where trains and buses are available, these options will also appear in your search results – so you can compare all your options and find the best way to get there on less CO₂.
The prices and percentages shown are for illustrative purposes only.
Choosing the right flight is just the start. As travellers, we can make choices to reduce our travel impact throughout the entire journey – from planning to transport to activities on location. Get some help with these sustainable travel tips.
The well-being of this planet involves us all. That’s why, just as KAYAK creates transparency on flight prices, we’re now also giving you transparency on the environmental impact of flights.
But we know there is no one solution. We will continue to develop other eco-travel products to help protect our planet for future generations.