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Boeing 777-300ER continues to outperform Airbus A350 in capacity and reliability

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Boeing 777-300ER continues to outperform Airbus A350 in capacity and reliability
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CEO Kelly Ortberg | Boeing

For more than 20 years, the Boeing 777-300ER has played a significant role in long-haul aviation. As an extended-range version of the original 777-300, it has become a key part of international airline fleets, connecting major cities with a combination of range and capacity. While newer aircraft like the Airbus A350 have entered the market, the 777-300ER remains a mainstay for many airlines due to its established engineering, operational flexibility, and passenger appeal.

The Boeing 777-300ER is known for its spacious cabin, which offers a wider interior compared to the Airbus A350. Airlines can choose between a 9-abreast or 10-abreast seating layout, allowing for either increased comfort or higher capacity. The aircraft also features larger windows—about 12% bigger than those on the A350—high ceilings, and overhead bins designed for accessibility and storage. These design choices contribute to a more comfortable experience for passengers across all classes.

In terms of capacity, the 777-300ER typically seats between 365 and 396 passengers, while the A350-900 usually accommodates 300 to 350. This difference, though it may seem small, can result in significant additional revenue for airlines over time. The 777-300ER also has a higher cargo capacity, with a design that allows for substantial freight volumes without reducing passenger load. This is particularly important on international routes where cargo contributes to overall profitability.

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The aircraft is powered by General Electric GE90-115B engines, which are the most powerful commercial jet engines in service, each producing up to 115,000 pounds of thrust. This enables the 777-300ER to operate effectively from airports at high altitudes or in hot climates, and to fly nonstop routes up to approximately 7,370 nautical miles (13,650 kilometers). While the A350 series offers a similar range, the 777-300ER maintains a performance advantage when operating at high payloads.

Reliability is another factor in the 777-300ER’s continued popularity. Since entering service in 2004, the aircraft has achieved operational reliability rates above 99%. More than 800 units have been delivered, resulting in a global support network that includes spare parts, trained technicians, and maintenance facilities at major airports. This established infrastructure leads to reduced turnaround times and simplified logistics for airlines.

The 777-300ER’s adaptability has made it a flagship for airlines such as Emirates, Qatar Airways, and Singapore Airlines. Its ability to replace older four-engine aircraft like the Boeing 747 or Airbus A340 has allowed airlines to maintain long-haul capacity with lower operating costs. The aircraft’s performance also supports its use as a freighter, further enhancing its value to operators.

Despite the arrival of the Airbus A350, the Boeing 777-300ER continues to offer a combination of capacity, reliability, and operational support that is attractive to airlines and passengers alike. Boeing plans to build on this legacy with the upcoming 777X, although its success remains to be seen.

The 777-300ER’s track record demonstrates that established design and operational dependability remain important in commercial aviation.

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