Airport ranking, 2024. 

Best efficiency:

1. Tallinn 🇪🇪 
2. Mulhouse / Bâle 🇫🇷 
3. Riga 🇱🇻 
4. Bastia-Poretta 🇫🇷 
5. Singapore - Changi 🇸🇬 
6. Busan - Gimhae 🇰🇷 
7. Boston (GELL) 🇺🇸 
8. Montpellier 🇫🇷 
9. Strasbourg 🇫🇷 
10. Zurich - Kloten 🇨🇭 
11. Oslo Gardermoen 🇳🇴 
12. Tokyo - Narita 🇯🇵 
13. Hong Kong - Chek Lap Kok 🇭🇰 
14. Santiago - Comodoro 🇨🇱 
15. Helsinki - Vantaa 🇫🇮 
16. Pointe-à-Pitre 🇬🇵 
17. Budapest Listz Ferenc 🇭🇺 
18. Doha Hamad 🇶🇦 
19. Stockholm Arlanda 🇸🇪 
20. Kraków John Paul II 🇵🇱 

According to Flight-Report