Dassault Falcon 2000LXS for sale / Range: 4,000 nm with eight passengers and NBAA IFR reserves / Passengers: 8 to 10 / Cabin: 92 in wide, 74 in high, 26 ft 2 in long.
This is one of the closest comparisons to the Challenger 650. Range is almost identical, while the Falcon has a slightly wider cabin and lower published takeoff distance. The Challenger gives you a longer cabin, so the choice comes down largely to cabin layout, airport requirements and the individual aircraft.
Gulfstream G280 for sale / Range: 3,600 nm with four passengers and NBAA IFR reserves / Passengers: up to 10 / High-speed cruise: Mach 0.84.
The G280 is smaller inside, with a 6 ft 11 in wide cabin, but it is a strong performer and can cruise faster than the Challenger 650. If speed and runway performance carry more weight, the G280 deserves attention. If cabin width and passenger space are higher on the list, the Challenger has the stronger argument.
Embraer Praetor 600 for sale / Range: 4,018 nm with four passengers, NBAA IFR reserves and a 200 nm alternate / Passengers: up to 12 / High-speed cruise: 466 kt.
This is probably the most direct newer-generation alternative. Its range is essentially the same as the Challenger 650, but the Praetor 600 brings a newer airframe, Pro Line Fusion avionics and 155 cu ft of baggage and storage volume. The Challenger's advantage is the much longer operating history of the platform.
Cessna Citation Longitude for sale / Range: 3,500 nm with four passengers / Passengers: up to 12 / Maximum cruise: 483 ktas.
The Longitude is smaller in the cabin, at 77 in wide versus 7 ft 11 in for the Challenger 650, but it is faster and has a modern super-midsize design. It is an interesting choice when speed, newer technology and operating economics matter more than having the Challenger's particularly wide cabin.
Embraer Legacy 650E for sale / Range: roughly 3,900 nm / Passengers: up to 14 depending on configuration.
The Legacy 650E is worth adding because it sits very close to the Challenger 650 in mission profile and cabin class. Its cabin is longer, giving it more room for passengers and separate seating areas, while the Challenger has the advantage of a wider cabin and a slightly longer published range. For buyers who regularly carry a larger group, the Legacy deserves a place on the shortlist.