Airbus Helicopters H155 vs Airbus Helicopters H175 vs Bell 525 Relentless vs Leonardo Aw139 vs Leonardo Aw189

The Airbus Helicopters H155 is a medium twin typically positioned for corporate and EMS missions, offering moderate range and a cabin usually configured for about 8–12 passengers depending on interior fit. The Leonardo AW139 sits in a similar “intermediate” class but is often treated as the benchmark utility/corporate twin, with broadly comparable passenger capacity (commonly around 10–15) and a generally longer practical range than lighter mediums when configured for transport. Stepping up, the Airbus H175 and Leonardo AW189 are larger super-medium helicopters aimed at offshore energy, SAR, and high-utilization transport. Both deliver longer range than the H155/AW139 class and higher typical passenger loads, commonly in the mid-teens to high-teens (often about 16–19 in transport layouts). The Bell 525 Relentless competes in the same super-medium category, targeting similar offshore and corporate roles with range and payload intended to match or exceed typical super-medium expectations, and passenger capacity likewise generally in the mid-to-high teens depending on configuration. Overall, H155 and AW139 are medium/intermediate with moderate range and lower passenger counts; H175, AW189, and Bell 525 are super-medium with longer legs and more seats.