Boeing 737-600 vs. Boeing 767-300ER

Launched in 1998, the Boeing 737-600 is the smallest aircraft in the 737 Next Generation (NG) series. It succeeded the 737-500, and was a significant evolution in Boeing's narrow-body offerings. It featured many upgraded features from the previous 737s, including aerodynamics, engines, and avionics. As the smallest NG variant, the 737-600 was designed for efficiency and adaptability, catering to airlines requiring a compact jet for short to medium-haul routes.

This aircraft extends 102.4 feet (31.2 meters) in length with a wingspan of 112.6 feet (34.3 meters). The 737-600, with a typical seating capacity for 123 passengers, offers an ideal balance between passenger comfort and efficiency, making it a fitting choice for airlines serving routes with moderate passenger demand. Equipped with two CFM International CFM56-7B20 engines, the 737-600 has a total thrust of 45,400 lbf (202.0 kN). This engine power, coupled with a fuel capacity of 6,868 US gallons (26,000 liters), gives the -600 a range of 3,051 nautical miles (5,650 kilometers). The 737-600 has a cruise speed of 528 mph (850 km/h) enabling airlines to maintain efficient and swift operations, particularly beneficial for regional network connections.

In the late 1990s and early 2000s, the Boeing 737-600 competed with aircraft such as the Airbus A318 and Bombardier CRJ series, offering airlines a modern alternative in the narrow-body market. Airlines including Scandinavian Airlines (SAS), Westjet, and Air Algerie operated the Boeing 737-600. Ultimately, the -600 variant was not a popular model of the 737 due to its economics. The -700, only slightly heavier, had a much greater payload. Additionally, the larger market was moving more towards higher capacity narrow-bodies with lower unit costs and greater revenue opportunities.

The Boeing 767-300ER, an extended-range variant of the 767 family, entered service in 1988 as a response to the growing demand for efficient and versatile wide-body aircraft. This model, with its significant enhancements in range and capacity, has become a staple in the fleets of various airlines for long-haul operations. At its peak in the 1990's, a brand new 767-300ER was valued at roughly $85 million.

With a length of 54.9 meters (180.2 feet) and a wingspan of 47.6 meters (156.2 feet), the 767-300ER is designed for operational efficiency in both airport compatibility and aerodynamics. The wing area of 283.3 square meters (3049.4 square feet) contributes to the aircraft's stable and efficient flight characteristics, especially over extended distances.

The -300ER's increased range was made possible by larger fuel tanks and a higher max takeoff weight (MTOW) of 407,000 lbs (185,000 kgs). The updated variant has a fuel capacity of 90,700 liters (23,960 US gallons), allowing it to cover distances of up to 11,070 kilometers (5,977 nautical miles). This capability makes it particularly suitable for transcontinental and transoceanic routes, offering airlines the flexibility to connect distant cities with fewer stops. Engines options for the -300ER included Pratt & Whitney PW4000s, General Electric CF6s, or Rolls-Royce RB211s. These were capable of a total maximum thrust of 548.0 kN (123,000 lbf). The aircraft exhibits robust performance, necessary for long-haul flights carrying a full load of both passengers and cargo.

The cabin of the 767-300ER is designed to typically seat 261 passengers in a dual-class layout, with the potential to accommodate up to 351 passengers in a high-density configuration. The typical layout includes a spacious business class and a larger economy class, often arranged in a 2-3-2 seat configuration, balancing passenger comfort and density.

Competing in the wide-body market, the Boeing 767-300ER has faced competition from aircraft such as the Airbus A330 and the smaller A300. These models offer similar long-range capabilities and passenger capacities, making the market segment highly competitive. Many carriers have operated the 767-300ER, including Delta Air Lines, United Airlines, British Airways, Japan Airlines, and All Nippon Airways. These carriers have leveraged the aircraft's range and capacity to effectively serve a variety of long-haul routes, underlining its role as a versatile and reliable option in their fleet.

The Boeing 767-300ER's introduction and subsequent service record reflect its importance in the evolution of wide-body aircraft, particularly in the context of long-haul commercial aviation. Its combination of range, capacity, and operational flexibility has solidified its position as a significant player in the global aviation industry.