The B-market 777-200ER ("ER" for Extended Range), originally known as the 777-200IGW (increased gross weight), has additional fuel capacity and an increased MTOW enabling transoceanic routes.
With a 658,000 lb (298 t) MTOW and 93,700 lbf (417 kN) engines, it has a 7,065 nmi (13,084 km) range.
It was delivered first to British Airways on February 6, 1997.
Thirty-three customers received 422 deliveries, with no unfilled orders as of April 2019.

As of July 2018, 338 examples of the -200ER are in airline service.
It competed with the A340-300.
Boeing proposes the 787-10 to replace it.
The value of a new -200ER rose from US$110 million at service entry to US$130 million in 2007; a 2007 model 777 was selling for US$30 million ten years later, while the oldest ones had a value around US$5–6 million, depending on the remaining engine time.

It could be delivered de-rated with reduced engine thrust for shorter routes to lower the MTOW, reduce purchase price and landing fees (as 777-200 specifications) but can be re-rated to full standard.
Singapore Airlines ordered over half of its -200ERs de-rated.
The B-market 777-200ER ("ER" for Extended Range), originally known as the 777-200IGW (increased gross weight), has additional fuel capacity and an increased MTOW enabling transoceanic routes. With a 658,000 lb (298 t) MTOW and 93,700 lbf (417 kN) engines, it has a 7,065 nmi (13,084 km) range. It was delivered first to British Airways on February 6, 1997. Thirty-three customers received 422 deliveries, with no unfilled orders as of April 2019.
As of July 2018, 338 examples of the -200ER are in airline service. It competed with the A340-300. Boeing proposes the 787-10 to replace it. The value of a new -200ER rose from US$110 million at service entry to US$130 million in 2007; a 2007 model 777 was selling for US$30 million ten years later, while the oldest ones had a value around US$5–6 million, depending on the remaining engine time.
It could be delivered de-rated with reduced engine thrust for shorter routes to lower the MTOW, reduce purchase price and landing fees (as 777-200 specifications) but can be re-rated to full standard. Singapore Airlines ordered over half of its -200ERs de-rated.
Boeing 777