Pack lightweight clothing, reef-safe sunscreen, a light rain jacket, and layers when traveling from Hartsfield–Jackson Atlanta International Airport (ATL) to Ellison Onizuka Kona International Airport at Keahole (KOA) in January: Atlanta departures may require a coat for the airport commute, while Kona arrivals favor beachwear and a sweater for cooler evenings. Reserve rental cars and whale-watching tours in advance, watch for MLK Day travel spikes, enroll in TSA PreCheck to speed ATL security lanes, and buy refundable or flexible tickets if traveling during winter weather windows. CTA: Prepare now—set fare alerts, reserve rentals, and pack reef-safe sunscreen for your January Kona adventure.