The primary difference between the Boeing 777-300 and the 777-300ER ("Extended Range") lies in their range, engine power, and structural design. The standard 777-300 was designed for high-capacity, medium-haul routes with a range of approximately 6,000 nautical miles. In contrast, the 777-300ER is a "B-market" variant with a significantly longer range of about 7,370 nautical miles, making it the flagship of the 777 family for long-haul international travel. To achieve this, the -300ER features the world's most powerful jet engine, the GE90-115B, alongside structural reinforcements in the wings, fuselage, and landing gear. Visually, the -300ER can be identified by its "raked" (extended) wingtips, which improve aerodynamic efficiency. While the standard -300 was primarily popular with Asian carriers for regional hops, the -300ER became the global gold standard for 2026's long-distance fleets, often replacing older Boeing 747s.