One lands at the airport Jomo Kenyatta International in Nairobi, 15 km away from the capital. Airport buses or taxis take you to the metropolis of Kenya or to Wilson National Airport, from where most domestic flights depart. Have your flight reconfirmed in order to be informed of changes in departure times in good time. Pretty much all known airlines fly to Nairobi and Mombasa.
From Diani Beach ( Ukunda Airport ) you can fly to Wilson Airport in Nairobi. The flights go daily and almost every hour until about 16:00 clock. From the national Wilson Airport in Nairobi to the International Kenyatta Airport in Nairobi it is about 18km.