You can book a flight from JFK to Nairobi for $242USD. The following dates are available:
Consider going to Nairobi for the days leading up to Pesach, and then flying to South Africa for a dirt cheap resort (compared to elsewhere with the Rand in the toilet) for Pesach.
Unfortunately, I cannot seem to see a similar price out of Toronto as Kenyan Airways (which is the airline you'll be flying on) does not fly out of Toronto.
The booking is through the Delta website, and you have up to 24 hours after you book it to cancel so you have nothing to lose to book now! Follow the link on the dates to book on Delta. To find your own prices, go to either the ITA Software Matrix or Google Flights.