The closest airport to Dondon is Cap Haitien, which offers daily flights from Miami via American Airlines. Port-au-Prince also offers multiple flights per day from many North American cities. Sunrise Airways is a Haitian airline that offers multiple daily flights (30 minutes) between Port-au-Prince and Cap Haitien.
Dondon is located about a 1 hour drive from Cap Haitien, and a 5 - 6 hour drive from Port-au-Prince. We highly recommend hiring a local driver instead of renting your own car, as the road to Dondon is mountainous and traffic laws are minimal. We can coordinate transportation for you from different areas of Haiti.