1. Turkish Airlines - 117 countries served
  2. Lufthansa - 78
  3. Air France - 78
  4. British Airways - 78
  5. Qatar Airways - 73
  6. Delta - 71
  7. Emirates - 70
  8. KLM - 66
  9. Egyptair - 66
  10. United - 60


http://www.turkishairlines.com/