The effect of COVID-19 on the global CO₂ emissions ratio of international vs. domestic aviation [OC]

In this final chart on the topic of global aviation CO₂ emissions, I look at the relative contribution of international vs. domestic aviation.

On average, international aviation accounts for ~72% of the sector's emissions.

During the closure of the world's major airport hubs, that share dropped to 60%.

While international flights were hit hard by border closures and travel bans, domestic flights were less affected, leading to an increase to their relative contribution to aviation emissions.

The two previous posts of this series can be found here:

• Daily CO₂ emissions generated by the global aviation sector, 2019-2025
• Seasonality of daily CO₂ emissions generated by the global aviation sector, 2019-2025