To distinguish between a Boeing 777-300 and a 777-300ER (Extended Range), the most obvious visual cue is the wingtip design. The 777-300ER features distinctive raked wingtips—extra-long, tapered extensions that angle back—while the standard 777-300 has traditional, flat wingtips. Additionally, the engines on the 300ER are significantly larger; it is powered exclusively by the massive General Electric GE90-115B, which has a much wider diameter than the engines typically found on the original 777-300. Another subtle hint is the landing gear; the 300ER has a beefier, reinforced gear system to handle its higher maximum takeoff weight. In 2026, the 300ER is the far more common sight globally, as the standard 777-300 was primarily popular with Asian carriers for regional routes. If you see a 777 with a wingspan nearly four meters wider than the fuselage length suggests, and it has تلك curved wingtips, you are almost certainly looking at the long-haul "ER" variant.