In most standard commercial aircraft, A and F are indeed the window seats. For narrow-body planes (single-aisle), such as the popular Boeing 737 or Airbus A320 with a 3-3 configuration, "A" is the window seat on the far left of the aircraft and "F" is the window seat on the far right. Between them, B and E are middle seats, while C and D are aisle seats. In smaller regional jets with a 2-2 layout, "A" and "D" are typically the window seats. For wide-body aircraft (twin-aisle), the window letters may shift depending on the airline's specific cabin layout, often using letters like A and K to denote the windows to avoid confusion with numbers. Regardless of the aircraft, checking the seat map during booking or using tools like SeatGuru is recommended, as some rows might lack a window due to structural components or galleys, despite being labeled with an "A" or "F."