- The quietest airplanes use advanced high-bypass engines, aerodynamic improvements, and soundproofing to reduce both cabin and external noise.
- Among commercial jets, the Airbus A220 is considered the quietest, while the Boeing 787 and Airbus A350 are the quietest wide-body aircraft; Gulfstream G700 and Dassault Falcon 8X lead in private aviation.
- Electric aircraft are the quietest overall due to the absence of combustion engines, offering minimal mechanical and engine noise.
Airplane noise has been a concern since the early days of aviation. Early aircraft were extremely loud, causing discomfort to passengers and communities living near airports. With the growth of commercial aviation and stricter environmental regulations, reducing aircraft noise has become a major priority. This raises an important question: What is the quietest airplane in the world?
The answer depends on whether we are talking about commercial passenger aircraft, private jets, or experimental aircraft. In this article, we will explore what makes an airplane quiet, which aircraft are considered the quietest, and how modern technology has transformed noise reduction in aviation.
What Makes an Airplane Loud?
Before identifying the quietest airplane, it is important to understand where aircraft noise comes from.
Main Sources of Airplane Noise:
- Engines – Jet exhaust and fan noise
- Airflow over the airframe – Wings, landing gear, and flaps
- Takeoff and landing operations – High engine power and drag
Historically, jet engines were the loudest component, especially during takeoff.
How Is Aircraft Noise Measured?
Aircraft noise is measured in decibels (dB). However, aviation authorities often use Effective Perceived Noise Level (EPNdB), which better reflects how humans experience sound.
Lower EPNdB values mean:
- Less noise impact
- Greater passenger comfort
- Reduced disturbance for airport communities
Modern aircraft must meet strict international noise standards to be certified.
Key Technologies That Make Airplanes Quieter
Modern quiet airplanes are not quiet by accident. They use advanced engineering solutions, including:
1. High-Bypass Turbofan Engines
- Large front fan
- More air bypasses the engine core
- Less jet exhaust noise
2. Engine Nacelle Design
- Sound-absorbing materials inside engine casing
- Acoustic liners reduce fan noise
3. Chevrons on Engine Exhaust
- Saw-tooth edges on engine exhaust
- Smooth mixing of hot and cold air
- Reduced noise during takeoff and landing
4. Aerodynamic Improvements
- Smooth wing design
- Reduced airflow turbulence
- Quieter landing gear designs
Quietest Commercial Passenger Airplanes
Airbus A320neo Family
The Airbus A320neo is widely regarded as one of the quietest narrow-body aircraft in service.
Why it is quiet:
- New-generation engines
- Advanced noise-reduction nacelles
- Up to 50% smaller noise footprint compared to older A320 models
Passengers often notice a significantly quieter cabin, especially during climb.
Airbus A220
The Airbus A220 is frequently described as one of the quietest commercial airplanes ever built.
Key reasons:
- Extremely efficient high-bypass engines
- Advanced aerodynamic wing design
- Reduced external and internal noise
Many airports praise the A220 for its minimal noise impact on surrounding communities.
Boeing 787 Dreamliner
The Boeing 787 is one of the quietest wide-body aircraft in the world.
Noise-reduction features:
- Advanced turbofan engines
- Extensive use of composite materials
- Smooth wing shape reduces airflow noise
Passengers often report a calmer and quieter cabin experience compared to older wide-body aircraft.
Airbus A350
The Airbus A350 is another leader in low-noise aviation.
Why it is quiet:
- Latest-generation engines
- Optimized engine placement
- Highly refined aerodynamics
It meets the strictest international noise regulations with a large margin.
Quietest Regional and Short-Haul Aircraft
Turboprop Aircraft (Surprisingly Quiet Inside)
Modern turboprop aircraft like the Dash 8 Q400 are much quieter than older propeller planes.
- Advanced propeller design
- Active noise and vibration suppression systems
- Quiet cabins despite external propeller noise
The “Q” in Q400 literally stands for “Quiet”.
Quietest Private Jets
In the business aviation world, quietness is a major selling point.
Gulfstream G700
- Exceptionally low cabin noise levels
- Advanced soundproofing
- Engine placement designed to reduce cabin noise
Dassault Falcon 8X
- Three-engine design allows lower engine power
- Smooth and quiet cabin environment
- Known for one of the quietest cabins in private aviation
Experimental and Electric Aircraft: The Quietest of All
Electric aircraft are redefining what “quiet” means in aviation.
Electric Planes:
- No combustion engine noise
- Very low mechanical sound
- Ideal for urban and short-range flights
Although still limited in range and capacity, electric aircraft are the quietest airplanes ever developed.
Which Airplane Is the Quietest Overall?
Short Answer:
- For commercial passenger aircraft: Airbus A220
- For wide-body long-haul: Boeing 787 and Airbus A350
- For private jets: Gulfstream G700 and Falcon 8X
- Overall quietest technology: Electric aircraft
The Airbus A220 is often considered the quietest commercial jet currently flying.
Why Quiet Airplanes Matter
Quiet airplanes are important for several reasons:
- Better passenger comfort
- Reduced noise pollution
- Improved airport-community relations
- Compliance with strict environmental laws
Airports increasingly prefer quieter aircraft, and some even offer lower fees for low-noise operations.
Future of Quiet Aircraft
The future of aviation noise reduction includes:
- Ultra-high bypass engines
- Hybrid-electric propulsion
- Full electric regional aircraft
- Advanced sound-absorbing materials
Noise reduction will remain a key focus alongside fuel efficiency and sustainability.
Conclusion
So, what is the quietest airplane?
Thanks to modern technology, today’s airplanes are quieter than ever before. Among commercial jets, the Airbus A220 stands out as one of the quietest aircraft in the sky, while the Boeing 787 and Airbus A350 lead the wide-body category. Looking ahead, electric aircraft promise a future where flying may become almost silent.
Quiet airplanes are not just about comfort — they represent progress toward cleaner, smarter, and more community-friendly aviation.
