1. Singapore 2. Incheon 3. Hong Kong 4. Amsterdam 5. Heathrow 6. Narita 7. Dubai 8. Denver 9. Gimpo 10. SFO 11. Atlanta 12. Bahrain 13. Bangkok 14. SEATAC 15. Delhi 16. JFK 17. Doha 18. Boston 19. Houston 20. Raleigh 21. Paris 22. Charlotte 23. Warsaw 24. Fukuoka
Agree with most of these rankings. Especially Singapore at #1... far and away the best. But personally I would not rank Incheon so highly. Hong Kong, Heathrow, and Narita are better airports IMO. Amsterdam is nice but terribly overrated; still it's near the top. I don't remember Gimpo being that great. Bahrain is okay but quite tiny and doesn't deserve to be that high. Delhi... maybe I missed what was good about this airport. Feel the same way about Warsaw though I was last in Warsaw in 2004, maybe they built a new airport since then. Finally, both Qatar's airport and airline are acceptable but far from great. Especially the airport. Overrated by self-promoters.
Great quiz though for airport and airline enthusiasts like me:)
OR Tambo is probably one of the worst airports in the world, it's known as the airport of the thieves for a good reason.