Airbus Helicopters H135 vs Airbus Helicopters H175 vs Bell 525 Relentless vs Leonardo Aw139 vs Leonardo Aw189

The Airbus H135 is a light twin in the short‑ to medium‑range utility/EMS category, typically carrying about 5–7 passengers (depending on interior/mission fit) with a practical range on the order of roughly 300–350 nautical miles. The Airbus H175 is a super‑medium twin aimed at offshore and VIP transport, generally accommodating around 12–16 passengers with a typical range roughly in the 350–450 nautical mile class. The Bell 525 Relentless is also a super‑medium twin focused on offshore and corporate missions, commonly configured for about 12–16 passengers and offering range broadly comparable to other super‑mediums, roughly around 400–500 nautical miles depending on fit and reserves. The Leonardo AW139 sits in the medium twin category, often carrying about 10–15 passengers with typical range around 400–550 nautical miles. The Leonardo AW189 is a super‑medium optimized for offshore lift, usually about 16–19 passengers with range commonly in the 450–500 nautical mile bracket, varying by payload, reserves, and optional tanks.