Width of an Airplane Seat varies significantly by airline, cabin class, and aircraft type, directly impacting passenger comfort. In economy class, seats typically range from 17 to 18.5 inches wide on full-service carriers like Delta or Emirates, while budget airlines may squeeze seats to 16–17 inches to maximize capacity. Premium economy seats often span 18.5–19.5 inches, and business class ranges from 20–22 inches. First-class cabins on airlines like Emirates or Singapore Airlines offer 22–36 inches of width, with some private suites exceeding 40 inches. Seat width also depends on the aircraft model. For example: Boeing 737/Airbus A320 ~17–18" economy. Pro Tips for Comfort, Check for your flight’s specific seat dimensions. Opt for exit rows or bulkhead seats if available. Premium cabins on long-haul flights are worth the upgrade for space. While airlines prioritize profit over legroom, knowing your options helps you book smarter, because every inch counts at 30,000 feet.