This doc is from boeing.
https://www.boeing.com/farnborough2014/ ... ounder.pdf
777-300 5,845nmThe 777-300 carries 388 passengers with a range up to 5,845 nautical
miles (10,820 km). The 777-200ER (Extended Range) carries 314 passengers with a
range up to 7,510 nautical miles (13,900 km).
To offer airlines additional flexibility in serving nonstop routes, Boeing introduced
two new longer range 777 airplanes. In May 2004 Boeing delivered the first 777-300ER,
which carries 386 passengers with a range of 7,825 nautical miles (14,490 km). In
February 2006, Boeing delivered the first 777-200LR Worldliner (Longer Range), which
carries 314 passengers up to 9,290 nautical miles (17,205 km).
777-200ER 7,510nm
777-300ER 7,825nm
777-200LR 9,290nm