Google and UK launch trial to route flights around warming contrails

Google has partnered with the UK government and a group of aviation, meteorological and academic organisations to trial contrail avoidance across an entire stretch of oceanic airspace.

The initiative, called Operation Blue Skies, will run in Shanwick airspace, which covers the eastern portion of the North Atlantic corridor used by transatlantic flights. Google says this section of airspace accounts for roughly 5% of global contrail-related warming.

The trial will use AI-based forecasting to identify atmospheric conditions likely to produce persistent contrails, which can trap heat and add to aviation's climate impact. Aircraft would then be rerouted around these zones where feasible.

Google described the effort as the first government-backed trial of its kind to attempt contrail avoidance across a full oceanic airspace, rather than limited test flights or localised airspace segments. The North Atlantic corridor is one of the busiest long-haul flight paths in the world, which makes it a significant testing ground for such measures.

Details on the duration of the trial, the specific airlines or aircraft involved, and how success will be measured were not fully specified in available information.

The programme reflects growing interest among regulators and technology companies in addressing the non-CO2 climate effects of aviation, particularly contrail formation, alongside more established work on fuel efficiency and emissions. Further details on outcomes and expansion plans are expected as the trial progresses.