This operator can help select your international flights, but you'll have to book them yourself help
Fly to/from Kilimanjaro Airport (JRO - Check price) near Arusha. Or fly to/from Arusha Airport (ARK - Check price) via Dar es Salaam or Nairobi (Kenya)
A transfer from and back to the airport can be arranged for an extra cost
Additional accommodation before and at the end of the tour can be arranged for an extra cost
One thing I can say for sure is that the Safari Tour with Serengeti African Tours was the best. Mr. Abu gave me enough explanations about the tour before starting the safari tour and listened to our story. He was very kind and he felt good...