Think 1961 and airport or passenger ship.
Think 1961 and airport or passenger ship.
Nope on the air travel - there was a London to Nairobi flight, but Mombasa was regional only. I may not always like Wikipedia, but on history they're usually OK, and Mombasa's airport didn't do international flights until 1979.
As for passenger ships, do you have any idea how long that trip would have taken for Hawaii to Mombasa and back? And how expensive?