So, you take your seat in 9A, look across to see your fellow passenger in 9F has a window seat, as does the passenger in 8A and 10A. So, why you? Why 9A? Essentially, it’s all about air…Stay with us here. On all Boeing 737 aircraft (which make up the majority of the Virgin Australia fleet), air conditioning distribution ducts run through the fuselage, that is, the main body of the aircraft.