Three-engined aircraft were once at the forefront of commercial aviation, bridging the gap between early twinjets and large four-engine airliners. Trijets offered airlines the perfect mix of redundancy, range, and performance, allowing them to serve short runways, remote airports, and long-distance routes at a time when engine reliability and regulatory limits made twinjets less practical, and quadjets were either too big or too expensive to operate. From the iconic Boeing 727 to widebody workhorses like the DC-10 and MD-11, the trijet became a symbol of innovation and versatility in the jet age.

By the 2000s, advances in engine technology, stricter noise regulations, the removal of ETOPS restrictions, and the economics of fuel efficiency pushed most trijets out of commercial passenger service. But as of 2026, a handful still fly, mostly in cargo, government, military, and business roles, proving the trijet design’s enduring value. We will explore the last three-engined aircraft still in service today, detailing each type’s history, surviving examples, and why these “dinosaurs” continue to defy extinction.

Boeing 727: The Legendary Trijet That Kept Flying

Credit: Shutterstock

The Boeing 727 is one of aviation’s most iconic trijets, and arguably the type most associated with the golden age of jet travel. First flown in 1963 and introduced in 1964, the 727 was engineered to serve the booming domestic jet market, especially where runway length or airport infrastructure presented limitations for larger jets. Its three Pratt & Whitney JT8D engines mounted at the rear, T-tail configuration, and built-in airstair made it uniquely versatile among early jetliners.

The 727 was a commercial success, surpassing all other trijets in sales volume, with 1,832 airframes delivered during its production run. Major carriers such as United Airlines, American Airlines, Eastern, Pan Am, and Northwest all operated sizable fleets in the 1970s and 1980s, with the 727 serving as the backbone of domestic networks. Its ability to operate from shorter runways and smaller airports allowed airlines to expand routes into smaller cities and secondary hubs, making it a cornerstone of mid-century commercial aviation.

Despite its early success, by the late 1980s and 1990s, the 727s began to show signs of age. Rising fuel costs, stricter noise regulations, and the increasing reliability of twin-engine jets, particularly under ETOPS rules that enabled two engines to operate long overwater routes, hastened its retirement from passenger service. By the early 2010s, scheduled passenger flights were effectively extinct.

Current Boeing 727 operators, as of January 2026:

Source: Flightradar24, planespotters.net, airfleets.net

However, the decades-old Boeing 727 refused to completely vanish. Converted freighters became popular among small- and medium-sized cargo operators, particularly in the developing world. As of January 2026, only 11 Boeing 727s are still actively flying, as several cargo operators retired their 727 fleets, including Aerosucre, and Malibu Consulting, the last operator of a Boeing 727 in VIP configuration, retired its unique jet on December 13 after almost 60 years in service! The remaining ones are predominantly used as freighters, but also in government, military, and specialized mission roles, such as flying laboratories.

The longevity of the Boeing 727 comes from its solid design and adaptable systems. Its ongoing presence in the skies, even if not at peak levels, highlights the trijet’s lasting legacy in aviation history.

DC-10 and MD-11: Widebody Trijets In Cargo And Special Roles

Credit: Wikimedia Commons

The McDonnell Douglas DC-10 and its evolutionary successor, the McDonnell Douglas MD-11, represent the apex of commercial trijet development in the widebody category. The DC-10 first flew in 1970 and entered service in 1971, designed to fill the long-haul, medium-to-long-range market at a time when twinjets were still limited by ETOPS.

Despite early safety issues and a troubled public image in the 1970s, caused by the tragic American Airlines Flight 191 crash, the DC-10’s fundamentals proved robust, and many went on to long and productive careers in airline, military, and cargo operations. Its spacious twin aisles and solid structural design made it a favorite for high-capacity routes and, later, for freight conversions.

The MD-11 was McDonnell Douglas’ attempt to modernize the DC-10 concept with a stretched fuselage, increased wingspan, more efficient engines, and a two-crew glass cockpit. Once it entered service with Finnair in 1990, the MD-11 proved to have great range and payload, but it never quite met the performance and fuel-burn expectations set for it, particularly in passenger service. It entered too late to be successful due to the rise of twinjet widebodies. Only about 200 MD-11s were built before production ended in 1997.

By the mid-2010s, both aircraft had disappeared from major airline passenger service. Instead, they found new life in freight and special missions. As of January 2026, DC-10 operations are extremely limited, with only 7 still flying and 1 being parked. These include firefighting tankers with four 10 Tanker Air Carrier, specialized missions like Orbis International’s flying eye hospital, two refueling tankers by Omega, and one airframe from a cargo operator in Bolivia that still finds value in the type’s payload and range, but it has been parked since November 2025, and it is not clear if this aircraft comes back into service.

All airworthy MD-11s as of January 1, 2026:

Source: planespotters.net

The MD-11, in contrast, remains the last widely used commercial trijet in the world, but is now almost entirely used as a freighter aircraft. Leading operators include FedEx and UPS Airlines, with Western Global Airlines also fielding a small fleet. Collectively, these operators operate roughly 70 MD-11s worldwide as freighters. The MD-11’s substantial cargo capacity and range, along with the economics of its retirement vs. replacement, have kept it in the global freight fleet far longer than many anticipated. However, since November 2025, following the UPS Flight 2976 crash, the entire MD-11 fleet has been grounded, awaiting investigation reports, as reported by Reuters.

However, according to the latest updates, UPS retired its entire MD-11 fleet on January 27, 2026.

Together, the DC-10 and MD-11 showcase how the trijet evolved from passenger into freight workhorses, extending the life of these platforms long after their passenger days ended.

Related

The Striking Differences Between The McDonnell Douglas DC-10 & MD-11

Discover how the DC-10 and MD-11 reshaped wide-body design, defined the trijet era, and why their legacy still lingers in today’s skies.

Lockheed L-1011 TriStar: The Last Of A Class

Credit: Wikimedia Commons

One of the few aircraft that causes immense admiration among aviation enthusiasts is the Lockheed L-1011 TriStar. Launched in the early 1970s to compete with the DC-10, the TriStar combined sleek aerodynamics with advanced systems for its time, including an automated flight control system that reduced crew workload and innovative engineering on its S-duct rear engine.

The L-1011 was often lauded for its exceptional ride quality, stability, and robust design. Yet, despite these strengths, delays and financial woes surrounding its Rolls-Royce RB211 engines slowed production. Only 250 L-1011s were built, significantly fewer than the DC-10 family. This relative scarcity, combined with the type’s early retirement from passenger service, meant the TriStar was destined for the history books sooner.

The last airline passenger flights of the L-1011 occurred in the late 1990s and early 2000s, as airlines shifted toward more efficient twinjets and cargo conversions favored other platforms. By 2015, most examples had been scrapped, preserved in museums, or cannibalized for parts.

Remarkably, however, as of January 2026, only one L-1011 remains airworthy and flying. This solitary example, registered as N140SC, is operated by Northrop Grumman in the United States and known as the “Stargazer”. It serves as a mother ship for the Pegasus space launch system, where it plays a specialized role launching rockets from high altitude. Its survival far from commercial passenger service is a powerful example of both the dedication of its caretakers and the enduring engineering of the platform.

The final airworthy TriStar is a living relic of an era when airline designs were transitioning from analog to digital. The fact that this aircraft continues to fly almost half a century after its first flight is a tribute to its legacy.

Russian Trijets Still Flying: Yak-40, Yak-42, And Tu-154

Credit: Wikimedia Commons

Not all trijets faded away in the West. In the Soviet Union and its successor states, three-engine designs lived on long after Western airlines had moved to twinjets. Designed for rugged conditions and austere airfields, these types prioritized robustness.

The Yakovlev Yak-40 was an early Soviet regional jet that made its first flight in 1966, intended to serve local routes from small and rough fields that might be inaccessible to larger jets. Powered by three Ivchenko AI-25 turbofans and capable of carrying roughly 30–40 passengers, it was a significant achievement for Soviet civil aviation.

About 1,000 aircraft were built, and decades after production ceased, a small number of Yak-40s remain flying as of 2026, mostly in charter, VIP, government, or utility roles. Russianplanes.net databases estimate that around 45 Yak-40s are still active in various regions, particularly in parts of Russia, Central Asia, and Syria. Many are reconfigured for VIP transport or special missions rather than scheduled airline service.

The Yakovlev Yak-42, a larger short-to-medium-range trijet developed from the Yak-40, made its first flight in 1975. With only 187 aircraft built, the Yak-42 has nonetheless remained in active service, where its sturdy design is advantageous. In 2026, only 19 Yak-42s continue flying in charter, military support, or VIP roles across Russia and Kazakhstan.

Perhaps the most famous Russian trijet is the Tupolev Tu-154 — often dubbed the “Soviet 727.” 1,026 aircraft were built from 1968 until 1997; the Tu-154 served as Aeroflot’s backbone and flew countless passengers across the vast reaches of the USSR and across the Warsaw Pact countries. As of January 2026, data from the Russianplanes.net database shows that around 25 Tu-154s remain in active service, almost entirely in military or government roles in Russia, China, and Kazakhstan. The last commercial operator of this type was Air Koryo of North Korea; its only airworthy Tupolev Tu-154 was last seen in August 2025 in Vladivostok.

These Russian trijets are rarely seen on Western radar feeds, yet they continue to operate on remote routes, VIP missions, and state transport flights. Their persistence reflects not just engineering durability, but the specific operational contexts of post-Soviet aviation.

Related

The Last Plane In America With A Flight Engineer

The last US-built commercial airplane with a flight engineer was a 747-200, although a unique aircraft with a flight engineer was built in 2019.

Dassault’s Three-Engine Business Jets: The Trijet That Thrives

Credit: Dassault Falcon

Commercial aviation largely abandoned the trijet, but in business aviation, it thrived, particularly with French manufacturer Dassault Aviation. The Falcon family of trijet business jets includes landmark models such as the Falcon 50, Falcon 900, Falcon 7X, and Falcon 8X, many of which are still in production or active service today.

Business trijets provide distinct advantages that resonate with their operators. The third engine adds redundancy and improved hot-and-high performance, especially valuable when operating from smaller corporate airports or challenging runways. Unlike commercial routes, private jets can capitalize on the trijet’s capability without the same priority on fuel efficiency that drives airline economics.

Today, hundreds of Falcon trijets fly worldwide. The Falcon 7X and 8X remain in relatively active production and service, each with ranges exceeding 5,000 nautical miles, high-speed cruise performance, and sophisticated avionics suites. The Falcon 900 family also remains popular in corporate and fractional fleets.

Unlike commercial trijets like the 727 or DC-10 that became niche carriers near the end of their lives, Dassault’s trijet business jets sustained demand because they satisfied specific corporate needs — such as transcontinental range, short-field access, and redundancy for overwater flights. These airplanes are not relics of a bygone era; they have adapted and endured where their performance makes sense.

In this sense, Dassault’s trijets are perhaps the purest continuation of the trijet concept — modern, capable, and still relevant in 2026.

The Trijet’s Unlikely Survivors

Credit: Wikimedia Commons

The trijet was once a central chapter in aviation history, meeting airlines’ needs at a time when engine reliability and regulatory frameworks demanded creative solutions. As jet engine technology advanced and fleets trend toward twins, these trijets remind us of a transitional era in jet aviation — one where clever engineering met the demands of a rapidly expanding global air transport network.

Today, what remains are specialized roles that value what trijets uniquely offer, such as rugged performance, redundancy, or specific mission capability. From a handful of Boeing 727 freighters still flying into remote areas, to widebody MD-11 cargo workhorses, a lone L-1011 serving space missions, rugged Russian trijets in government service, and Dassault Falcons still crisscrossing continental skies, the trijet is not entirely gone and is far from being forgotten — in some corners of the sky, it still thrives.