When the Boeing 777-200LR (Longer Range) debuted, it was the longest-range commercial airliner on the market. The aircraft boasts a significantly longer range, but also a significantly lower capacity compared with its 777-300ER (Extended Range) counterpart. When discussing the range of aircraft, it is important to keep in mind that range is determined by a large number of factors, like jet streams, payload, airspace closures, and more. The actual range of an aircraft can differ significantly depending on the mission.