Introduced in 2009, the Beechcraft King Air 350i transformed the proven King Air 350 platform into a more refined and passenger-focused business aircraft. Designed to deliver jet-like comfort while retaining the versatility and efficiency of a turboprop, the 350i featured major upgrades to its interior environment and flight deck. For corporate operators and private owners who demand both performance and comfort, the King Air 350i remains a standout choice in its class.

THE KING AIR 350I: PERFORMANCE MEETS LUXURY

Refined Interior and Quiet Cabin

The 350i introduced Beechcraft’s “Cabin Comfort System”, which dramatically improved the passenger experience. Cabin noise was reduced by up to 50% compared to earlier King Air models through a combination of technologies:

  • Electronically tuned dynamic vibration absorbers minimized airframe vibration.
  • Bagged acoustic insulation provided superior noise absorption.
  • Scotch damp panels further suppressed residual vibration.

These refinements created one of the quietest turboprop cabins available, reducing passenger fatigue and enhancing productivity on longer missions.

ADVANCED AVIONICS

When launched in 2009, the 350i came standard with the Rockwell Collins Pro Line 21 avionics suite—a four-screen, fully integrated glass cockpit offering digital weather, electronic charts, and advanced situational awareness features.

In 2016, Beechcraft transitioned the King Air 350i to the Rockwell Collins Pro Line Fusion avionics suite. Fusion added touchscreen flight displays, synthetic vision, and intuitive navigation tools, making the cockpit more capable and user-friendly. This upgrade further enhanced the aircraft’s appeal to both owner-operators and corporate flight departments.

UNMATCHED CABIN SPACE

The King Air 350i remains the largest member of the King Air family, with a cabin nearly 19 feet long that can seat up to 11 passengers. Its square-oval cross-section maximizes headroom and shoulder room, while club seating, LED lighting, and optional in-flight connectivity create an environment tailored to productivity and comfort.

PROVEN PERFORMANCE AND PAYLOAD

Equipped with twin Pratt & Whitney PT6A-60A engines producing 1,050 shp each, the 350i offers a cruise speed of over 310 knots and a range of approximately 1,800 nautical miles. Standard winglets, a 15,000-pound MTOW, and rugged trailing-link landing gear provide excellent short-field performance and payload flexibility, ensuring the 350i can serve everything from corporate to government and special mission roles.

ACQUIRING A KING AIR 350I WITH HOLSTEIN AVIATION

At Holstein Aviation, we have deep expertise in the King Air 350i market. Our IADA-certified team provides:

  • Guidance on evaluating Pro Line 21 vs. Pro Line Fusion-equipped aircraft
  • Detailed analysis of cabin refurbishment quality and acoustic upgrades
  • Access to top-quality pre-owned 350i aircraft worldwide

Whether you are buying, selling, or upgrading, we ensure a seamless transaction and maximum value.

EXPERIENCE THE QUIET COMFORT OF THE KING AIR 350I

For operators seeking the quietest and most refined King Air yet, the Beechcraft King Air 350i delivers unmatched comfort and proven performance. Contact Holstein Aviation today to explore King Air 350i for sale opportunities and find the aircraft that best matches your mission requirements.

October 17, 2025

Intelligent Design: The Modern Cabin of the Beechcraft King Air 350i

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Written by 

Don Mercer

Aircraft Profiles & Comparisons