Boeing 777 Family Variant Capacity Boeing 777-200 ~305 seats Boeing 777-200ER ~300 seats Boeing 777-200LR ~300 seats Boeing 777-300ER ~390 seatsThe Boeing 777-300ER ultimately became the family's bestseller, and it offered a range of 7,370 nautical miles in a 392-seat configuration. A Closer Look At The Boeing 777-300Credit: ShutterstockThe Boeing 777-300, launched on June 26, 1995, was the first stretched variant in the 777 family. Boeing ultimately pitched the Boeing 777-300 as a replacement for the Boeing 747, arguing that it had a much lower fuel burn and far lower maintenance costs than its lumbering quadjet predecessor. The Boeing 777-300ER Sold Far Better Than The 777-300Credit: ShutterstockDespite being a capable aircraft in its own right, the Boeing 777-300 failed to sell as well as expected. That, however, is not to say that the Boeing 777-300 was a complete commercial failure.