Google and Cathay Pacific Test AI-Based Contrail Avoidance Technology, Reducing Warming Impact by 40%

Google and Cathay Pacific have entered a partnership to test AI-based contrail avoidance technology on ultra-long-haul flights in the Asia-Pacific region. Contrails are a major warming factor accounting for approximately 1/3 of the aviation industry's total climate impact (per IPCC AR6 WGIII), and Google applied a method using AI to help pilots make fine adjustments to flight altitudes to avoid generating heat-trapping contrails.

In the initial pilot operations, more than 80 flights were operated along contrail avoidance routes, and Google's satellite image analysis estimates that these flights reduced contrail warming impact by approximately 40%. In particular, interventions in airspace conducive to persistent contrail formation, such as the Hong Kong–Singapore segment, accounted for more than 50% of the total emission reduction in the pilot operations.

This system combines AI predictions, satellite imagery, and advanced weather intelligence to identify contrail formation zones in advance. Cathay Pacific connects dynamic forecasts directly to the flight deck via in-flight Wi-Fi and its proprietary Electronic Flight Folder (EFF), providing real-time insights without disrupting standard Cockpit workflows. Currently, both companies are expanding to a second-phase pilot operation targeting more than 100 flights, and are also collaborating with the non-profit organization Contrails.org to contribute to global contrail research.