There is a problem with this. It assumes he was born before June 30, 1961. But there is no evidence of that.
When you look at the July 1, 1961 to June 30, 1962 (including August 4th, 1961). There were only 21 people who came from Kenya by sea or air. Of those fourteen were aliens and 7 were citizens. Of those only one alien traveled by air and no citizens traveled by air.
http://archive.org/stream/annualreportofim1962unit#page/73/mode/1up
Page 74, Table 31 Passengers Arriving in the United States, by Sea and Air, from Foreign Countries, By Country of Embarkation
Ann and her newborn son flew from Nairobi to London, via BOAC Flight BA162 and then took the non-stop BOAC flight from London to Vancouver, Canada. She then traveled the 110 miles or so, across the border, to Seattle in time to start Fall Semester, night-school extension classes at the University of Washington.
The trip would be challenging for a new mother, but she was young, healthy, intelligent, and capable. BOAC was very accomodating to mothers with young children back in the 1960s. No real problem!
From the Airline Timetable Images - List of Complete Timetables, the cost of BOAC from April 24,1960 until October 1, 1962 was:
Thanks for pointing that out. I was afraid it sounded too good to be true.