The King Air 350 has a comfortable and roomy 'squared-oval' pressurised cabin. The air-conditioned cabin is fitted with double club-style seats for eight passengers,

An Ultra Electronics UltraQuiet active noise control system reduces the in-flight noise to under 80dB(A) in the passenger cabin. The active UltraQuiet system acoustically cancels propeller noise in the cabin by introducing sound waves that are of equal frequency and amplitude but are of opposite phase to the unwanted noise.