July to October is the cheapest time to fly to Cap Haitien. However, expect high rainfalls reaching up to 8.23" (209mm). The number of rainfall days could be from 14 to 16 days per month. For enjoying a holiday in Cap Haitien during peak season – January to April, booking your flights at least 4 to 6 weeks ahead of the flight departure can help you get cheap plane tickets to Cap Haitien.