As of 2026, Japan Airlines (JAL) is widely recognized as the leader for economy seat width, particularly on its Boeing 787 Dreamliner fleet. While most airlines have moved to a "9-abreast" configuration (3−3−3), JAL maintains an "8-abreast" (2−4−2) layout on many long-haul routes. This allows for a seat width of approximately 18.5 to 19 inches, compared to the industry standard of 17 to 17.5 inches. Other top contenders include Emirates on their Airbus A380 (approx. 18 inches) and Singapore Airlines. For domestic U.S. travel, JetBlue often provides the widest seats at 18 inches on their A320 and A321 aircraft. Having an extra inch or two of width may not sound like much, but it significantly reduces "shoulder overlap" with neighbors and improves overall comfort on flights exceeding 10 hours. When booking, savvy travelers check the aircraft type on sites like AeroLOPA, as seat width can vary even within the same airline depending on whether the plane is an older wide-body or a newer, more densely packed narrow-body jet.