How do I organise transport back to the airport at the end of my voluntary experience?

Just wondered how I would organise transport to airport at the end of my months stay. Is it something I could arrange before I come out or is it as simple as ordering a taxi, and do you have any idea how much I should budget for if going back to the NBO airport?

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We help you organize transport back to the airport. we provide you with telephone numbers of taxi drivers commonly used by our volunteers.

You do not have to organize that before coming.

Joe.