er777About the Boeing 777-300ER. We added the Boeing 777-300ER, a lengthier version of the 777-200ER, to our fleet in 2008. This triple sevenThis largest twin-engine jet burns 17,300 lb (7.8 tons) of fuel per hour at a speed of 495 knots (916 kmh or Mach 0.839) while cruising at an altitude of 30000 feet (FL300) with