Airbus Helicopters H225 vs Leonardo Aw139 vs Leonardo Aw189 vs Sikorsky S 92

All four are twin‑engine, medium‑to‑heavy helicopters used for offshore transport, SAR, and government/VIP roles, but they split into two size classes. The Leonardo AW139 is the smallest and typically offers the shortest range of the group; it is commonly configured around 12–15 passengers, making it popular where lower operating weight and high dispatch reliability matter more than maximum cabin volume. The Leonardo AW189 is a larger, “super‑medium” step up from the AW139, generally providing longer range and a roomier cabin, often arranged around 16–19 passengers in offshore layouts. Airbus Helicopters’ H225 and Sikorsky’s S‑92 sit in the heavy class, with the largest cabins and highest typical offshore passenger capacities, commonly around 19 passengers, and they tend to deliver the longest mission radii, especially with auxiliary fuel and optimized payload. In practice, AW139 fits shorter‑to‑medium sectors and smaller loads, AW189 covers longer offshore legs with mid‑high capacity, while H225 and S‑92 are chosen when maximum payload, cabin space, and long overwater capability are the priority.