ATR 72: King of Regional Turboprops

Design

The ATR 72 is a twin-turboprop regional aircraft manufactured by ATR (Avions de Transport Régional), a joint venture between Airbus and Leonardo (formerly Alenia Aermacchi) established in 1981 in Toulouse, France. The -72 designation refers to the aircraft's maximum seating capacity of 72 passengers. It is a stretch of the original ATR 42 (introduced in 1985), with a fuselage lengthened by 4.5 metres to accommodate the additional rows of seats.

The ATR 72 entered service with Finnair in October 1989. Its high-mounted wing keeps the propellers and engines clear of ground debris — essential on unpaved or contaminated regional airstrips — and provides excellent short-field performance. The T-tail empennage configuration places the horizontal stabilizer above propeller wash, improving stability. The aircraft features a conventional non-pressurized fuselage design on the ATR 42 and early ATR 72 variants, though later variants introduced pressurization to approximately 8,000 feet cabin altitude at service ceiling.

The current production variant, the ATR 72-600, entered service in 2009. It is powered by two Pratt & Whitney Canada PW127M turboprop engines, each producing 2,750 shaft horsepower and driving a Hamilton Standard six-blade composite propeller. The cockpit features a modern glass cockpit with five large LCD displays replacing the earlier electromechanical instruments.

Efficiency

The ATR 72's principal advantage over regional jets in its category is fuel consumption. Turboprops extract significantly more thrust per unit of fuel than turbofans at speeds below roughly 450 km/h (280 mph), because propellers achieve high propulsive efficiency at these speeds whereas the bypass airflow of turbofans becomes less efficient. The ATR 72-600 burns approximately 330 kg of fuel per flight hour, compared to roughly 650 kg/hour for the Embraer ERJ-145 regional jet on the same routes — a saving of approximately 50%.

For airlines operating routes up to approximately 500 km (270 nautical miles) at altitudes below 25,000 feet, this fuel efficiency advantage is decisive. An airline operating 10 daily round-trips on a 400 km route saves approximately 3,200 kg of fuel per day versus equivalent regional jets — at jet fuel prices of $1.00/kg, a saving of roughly $1.2 million per year per aircraft. Over a 20-year fleet life, this is a substantial economic advantage that explains the ATR's dominance in thin-route regional markets.

Operators

Over 1,900 ATR aircraft (all variants) have been ordered as of 2026, with over 200 operators in 100+ countries. The aircraft serves routes from the islands of Southeast Asia — IndiGo, Air India Regional, and Indonesian carriers are major operators — to the Mediterranean, Scandinavia, and Africa. IndiGo is one of the largest ATR 72 operators globally, deploying the type on low-density Indian domestic routes where its economics are unbeatable.

Air France's regional subsidiary HOP!, SAS, FlyBe (now reformed), Stobart Air (before closure), and dozens of smaller regional carriers have built their entire networks around the ATR 72. In the Pacific Islands and Caribbean, the ATR 72 serves as the primary link between communities where runway infrastructure precludes jets entirely. Papua New Guinea, Fiji, Vanuatu, and the Cook Islands all depend on ATR 72s as their primary inter-island transport.

vs Q400

The ATR 72's primary competitor is the Bombardier Q400 (now De Havilland Canada Dash 8-400). The Q400 is larger (up to 90 seats), faster (360 knots versus 275 knots for the ATR), and has better cold-weather performance — attributes that made it the preferred choice for Canadian, Scandinavian, and Alaskan operators. However, the Q400 costs more per seat-mile on shorter routes and consumed around 15-20% more fuel than the ATR 72 in direct comparison studies.

Both aircraft use Active Noise and Vibration Suppression (ANVS) systems to reduce propeller noise and vibration in the cabin, partially addressing the traditional complaint about turboprop passenger comfort. The ATR 72 is generally considered quieter in the cabin than the Q400 at cruise, while the Q400 offers a more jet-like speed and ride quality at altitude.

Short Runway Capability

The ATR 72-600 requires a balanced field length of approximately 1,290 metres at maximum takeoff weight under sea-level standard conditions — a remarkably short requirement compared to 1,800 metres for the Embraer E175 regional jet. At high-altitude airports and in hot conditions, the ATR's turboprops maintain performance better than turbofans in their thrust-producing regime, enabling operation from strips that jets cannot use without significant payload penalties.

This performance envelope opens entire networks inaccessible to jet operators. Nepal's mountain airstrips — including Lukla airport, famous for its extreme gradient — and the high-altitude Andean routes in Peru and Bolivia are served by ATR and similar turboprops. The Indonesian archipelago, with thousands of small airstrips varying in length, altitude, and surface quality, is one of the world's largest turboprop markets precisely because jet aircraft cannot economically serve many of those destinations.

Future of Turboprops

ATR's order book has remained robust through the 2020s, with approximately 100–150 aircraft sold per year. The company is studying a next-generation ATR — potentially incorporating hybrid-electric propulsion for the shorter segments — under the EVO (Enhanced Versatile Operations) program. Pratt & Whitney Canada has proposed the PW100-based Advanced Turboprop as a bridge technology while hybrid systems mature. The combination of rising jet fuel costs, expanding regional connectivity needs in Asia and Africa, and the industry's increasing focus on carbon reduction per seat-kilometre ensures that the turboprop's economic and environmental advantages will sustain demand well into the 2030s and beyond.