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 is included
Additional accommodation before and at the end of the tour can be arranged for an extra cost
I did 4 day tour (2 days in the Serengeti, 1 in Ngorongoro and 1 in Taragire). The first 3 were great and the wildlife and landscape amazing! The organization was lacking though and I wasn’t really told which order I was doing the tour...