Turkish or KLM AIrlines have round trip airfares travelling from Chicago (ORD) to Nairobi Kenya (NBO) for $650-$654. This makes 1 stop and some may be 2...depends on what you choose so ymmv.
Departs ORD: Scattered dates in Jan & Feb. Then end of March, most of April and early May.
Returns generally with 7-day minimum stay
Book this on Expedia [expedia.com]
and see which airline comes up. Google flights will not show Turkish Airlines prices unless you actually click on dates. I played with dates but for Turkish, departure on Sundays work.
link to recent travel deals