September travel from Dallas/Fort Worth International Airport (DFW) to Cairns Airport (CNS) benefits from dry, warm weather in northern Queensland. Pack lightweight, breathable clothing, reef-safe sunscreen, a hat, insect repellent for dusk rainforest walks, and a light rain jacket for coastal breezes. Keep in mind time difference (Cairns operates on AEST, typically UTC+10 with no daylight saving), currency (Australian dollars), and visa/ETA requirements—verify entry rules well before departure from DFW. Consider travel insurance that covers long international connections and outdoor activities like diving and snorkeling.