Question : Is price more important than specific travel days for you?
Answer : For the month of July, Sunday is your cheapest day to fly. Having flexibility in your travel plans means you can save more, so be sure to plan ahead when possible.
Question : Have you considered flying out of an airport besides LaGuardia Airport (LGA)?
Answer : Departing from LaGuardia Airport is not the only way to get to Jomo Kenyatta International Airport. Try looking for flights from John F. Kennedy International Airport (JFK) as well. Over the next few months, flights from JFK to NBO are being priced 10% cheaper than flights from LGA to NBO. Being only 10 miles away, it's easily accessible for most.
Question : How long do most people stay in Nairobi?
Answer : Of course you're not most people, but if you were, you'd stay roughly two weeks.