The calculation of aircraft flight routes and turbulence is an important area of applied and computational mathematics. Flight-routing through a given wind field is a minimisation problem, and turbulence forecasting relies on methods for diagnosing subgrid-scale turbulence from the large-scale flow. This seminar will discuss how climate change is modifying the results of these calculations. By inducing secular changes in the wind field at aircraft cruising altitudes, climate change is projected to modify flight routes and generate up to three times as much severe turbulence in the coming decades. Come along to find out how climate change will affect your future flights.