Bombardier certified the Challenger 604 in 1995, with deliveries beginning as 1996 models. The idea was straightforward: take the established Challenger platform, increase fuel capacity and operating weights, improve the engines, and bring the cockpit up to a new avionics standard.

The changes were substantial. The 604 received GE CF34 - 3B engines, additional fuel tanks, a stronger landing gear system and structural changes, while Collins Pro Line 4 became the main flight deck. Six CRT displays brought PFD, MFD and engine information into a much more integrated cockpit than earlier Challengers.

There is also a useful piece of market history here. Bombardier stated in 2003 that the Challenger 604 had been the best-selling large business jet since 1996, and current industry data still identifies the 604 as the most popular model in the Challenger series, with more than 350 delivered. Production eventually reached 365 aircraft.

• The 604 was a real step beyond the 601:

The fuel system and higher operating weights were not small changes. Bombardier also strengthened the undercarriage and made structural improvements around the aircraft. That work gave the 604 the payload and range needed for longer missions.
It is one reason the 604 became such an important model in the Challenger line.

• Pro Line 4 was advanced for its time:

When the 604 appeared, Collins Pro Line 4 represented a major cockpit change for the Challenger family. The original system used six CRT displays, including two primary flight displays, two multifunction displays and two engine displays.
Today, however, the original cockpit is an older-generation system. That matters when comparing aircraft. Some 604s have received major avionics modernization, including Pro Line Fusion installations with modern communications, navigation and display capabilities. The cost and scope of such work vary by aircraft, so the actual equipment list deserves close attention.
Older avionics are the honest friction here.

• 365 aircraft were built:

Production ended in 2006, with the final aircraft delivered in 2007 according to Business Air News. GlobalAir reports 365 aircraft built and 363 still operational in its fleet data.
That gives a buyer a reasonably broad second-hand fleet to investigate rather than relying on one or two unusual aircraft.

Falcon 2000 for sale, the newer two-engine alternative / Range: around 3,400 nm for the original Falcon 2000; later 2000EX/LX versions exceed 4,000 nm.
The Falcon has a slightly narrower cabin, 7.7 ft versus about 8.2 ft in the Challenger 604, but its cabin is longer. Newer 2000 versions also bring newer engines and avionics. The 604's advantage is cabin width and a slightly stronger long-range profile.

Gulfstream IV for sale, the larger option / Range: around 4,200 nm / Passengers: typically around 13 to 14.
The GIV gives you a much longer cabin, about 45 ft, and more cabin volume. It is the logical step up when passengers, baggage and longer missions matter more than aircraft size and acquisition cost.

Embraer Legacy 600 for sale, the cabin-volume alternative / Range: around 3,400 nm / Passengers: typically 10 to 13.
The Legacy 600 has a very long cabin and a large baggage area, with about 286 cu ft of baggage space. The Challenger 604 has the wider cabin, while the Legacy is attractive when cabin length and luggage capacity are the priority.

Gulfstream G200 for sale, the direct super-midsize rival / Range: around 4,100 nm / Passengers: around 8 to 9.
The G200 is closer to the 604 in mission profile, but its cabin is narrower and shorter, at roughly 7.2 ft wide and 24.5 ft long. The Challenger gives you more cabin space, while the G200 remains a serious alternative for buyers focused on range and speed.

Citation X for sale, the speed-focused alternative / Range: around 3,000 to 3,100 nm / Passengers: around 8 to 10.
The Citation X is considerably faster, with published maximum speeds around 600 knots, but its cabin is much narrower and shorter. It is the comparison to make when speed matters more than the 604's large-cabin layout.

The Challenger 604's clearest advantage remains cabin width combined with roughly 4,000 nm of range. That combination is what makes it worth comparing against aircraft from several categories.

The Challenger 604 works best when the mission calls for a genuinely large cabin and regular long-range flying, without moving into the size and cost of a Gulfstream GIV-class aircraft.

Consider a generic East Coast US to Western Europe mission with eight passengers. A published range around 4,000 nm puts that type of trip within the aircraft's intended mission envelope, although actual dispatch capability depends on payload, winds, reserves, airport conditions and the specific aircraft.

Domestic transcontinental work is an easier assignment. So are longer European sectors where the owner wants a proper stand-up cabin and space for a group rather than a narrow executive jet.

Shorter missions are where the wide cabin can be especially useful. Eight or ten passengers can work around a conference setup, club seating or a divan arrangement without turning the cabin into a corridor with seats.

The aircraft's size does create limits. If the usual mission is four passengers flying 1,000 to 1,500 nm, a smaller and newer jet may be easier to justify.

The Challenger 604 for sale remains attractive for a very specific reason: it puts a large, stand-up cabin, two CF34 engines and roughly 4,000 nm of published range into an aircraft that is now available on the mature pre-owned market.

Its strongest competitive point is cabin space relative to the mission and acquisition class. Its biggest concern is the age of the individual aircraft and everything that comes with it, especially avionics and engine program status.

If the mission is eight to twelve passengers and around 2,500 nm, start with the maintenance records, engine coverage and avionics list before comparing paint, interior or registration year.

Looking for a Challenger 604 for Sale?
Give us the mission first:

• How many passengers?
• Which routes?
• How much range do you need?
• What year or configuration do you prefer?
• What are your requirements for engines, maintenance and avionics?
• Where will the aircraft be registered and operated?

We will search the open market and our off-market network and come back with aircraft that fit the requirement.