widebody

A widebody aircraft has a fuselage wide enough to accommodate two or more aisles and typically seats seven to ten passengers across in economy class. The standard widebody cabin is approximately 6.1 to 6.5 meters in interior width, compared to 3.5 to 3.8 meters for a narrowbody. This dimension allows airlines to configure long-haul routes with the higher density and comfort expectations of international travel, generating revenue per flight that narrowbody aircraft cannot match on these routes.

Common widebody types in active service include the Boeing 777 (typically 10-across economy), Boeing 787 (9-across), Airbus A330 (typically 10-across), Airbus A350 (9-across), and Airbus A380 (the only modern double-deck widebody, with two full passenger decks). Each variant trades cabin width, length, and weight differently; the 787 is lighter and more fuel-efficient than the 777 or A330, while the A380 compensates for its weight through four engines and enormous total capacity. The choice of aircraft determines maintenance planning, hangar requirements, and ground support equipment needs.

The dual aisle is the defining feature that separates widebodies from narrowbodies operationally. Two aisles reduce passenger boarding and deplaning time on long flights, a critical factor when aircraft sit on the ground. Evacuation regulations also benefit: two aisles allow faster emergency egress. Cabin service becomes more efficient; flight attendants can reach lavatories and galleys from either side without squeezing past rows of seats.

Maintenance and Ground Operations

Widebodies demand specialized maintenance infrastructure. Engine removal and overhaul require larger bays and heavier lifting equipment. The increased fuselage length (typically 70 to 80 meters) means longer jigs for structural inspection and repair. Widebody aircraft also burn more fuel per flight hour, so fuel system complexity and tank inspection depth increase. Spare parts inventory is larger and more costly. Many smaller airports lack the facilities to turn around widebody aircraft; they are restricted to major hubs with appropriate hangars, tow equipment, and catering trucks capable of reaching higher cabin doors.

The term widebody emerged in the 1960s with the Boeing 747, the first commercially successful twin-aisle jet. It remains the informal industry standard for aircraft in this category, though some manufacturers prefer descriptors like 'twin-aisle' or 'large wide-body aircraft'. The distinction matters for route planning, fleet economics, and maintenance budgeting. A carrier operating both narrowbody and widebody fleets must maintain separate training programs, parts warehouses, and technical documentation for each class.