The length of the flight from Zanzibar to the Serengeti will depend on your route and whether you have a direct or connecting flight.

If you have a direct flight from Zanzibar to the Serengeti, the flight time is typically around 2-3 hours, depending on the exact location of the Serengeti airstrip.

If you have a connecting flight, the total travel time will be longer, as you will need to factor in the layover time at the connecting airport. The most common connecting airport for flights from Zanzibar to the Serengeti is Kilimanjaro International Airport or Arusha Airport.

It's worth noting that flight schedules and routes can vary depending on the time of year, as well as demand and availability. It's important to check with your chosen airline or travel agent to get the most up-to-date information on flight times and routes