Top 100 Busiest International Air Routes (2026 Data & Statistics)

Important Routes

Ranked by annual passenger volume

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🌍 Explore Regional CO2 Data

🧮 Calculate and compare the CO₂ (Carbon Dioxide) emissions of ✈️ flights, 🚆 trains, and 🛣 road travel between cities worldwide.

Select a region to compare the carbon footprint of travel between 🏙 cities.

🇪🇺 Europe CO₂ Calculator | Compare Carbon Footprint 🇺🇸 North America CO₂ Calculator | Compare Carbon Footprint
🇧🇷 South America CO₂ Calculator | Compare Carbon Footprint 🌍 Africa CO₂ Calculator | Compare Carbon Footprint
🇮🇳 India CO₂ Calculator | Compare Carbon Footprint 🇯🇵 Japan CO₂ Calculator | Compare Carbon Footprint
🇦🇺 Australia CO₂ Calculator | Compare Carbon Footprint 🏜️ Middle East CO₂ Calculator | Compare Carbon Footprint