The A320 is one aircraft in four sizes (A318, A319, A320 and A321), representing the most successful and versatile jetliner family ever. Seating from 100 to 240 passengers and flying throughout the world – and landing on every continent – an A320 takes off or lands every 1.6 seconds.

From the heat of the desert to icy Antarctic runways, or from short runway urban environments to remote high-altitude airports, the A320 can take passengers anywhere. As the longest-range single-aisle aircraft, airlines and passengers alike have benefitted from the A320’s exceptional efficiency and quality since its introduction, which has opened up exciting new travel possibilities throughout the world.

The A320 Family continues to be the preferred choice for passengers and customers; setting the standard for the single-aisle market and securing its status as the world’s best-selling aircraft of all time. This is an aircraft that you can rely on. This is the aircraft that changed the game.

The Boeing 757 is a mid-sized, narrow-body short to medium range, twin-engine airliner that was designed and built by Boeing Commercial Airplanes.

It is the manufacturer's largest single-aisle passenger aircraft and was produced from 1981 to 2004. The twinjet has a two-crew member glass cockpit, turbofan engines of sufficient power to allow takeoffs from relatively short runways and higher altitudes, a conventional tail and, for reduced aerodynamic drag, a supercritical wing design.

Intended to replace the smaller three-engine 727 on short and medium routes, the 757 can carry 200 to 295 passengers for a maximum of 3,150 to 4,100 nautical miles (5,830 to 7,590 km), depending on variant. The 757 was designed concurrently with a wide-body twinjet, the 767, and, owing to shared features, pilots can obtain a common type rating that allows them to operate both aircraft.

The McDonnell Douglas MD-80 is a series of twin-engine, short- to medium-range, single-aisle commercial jetliners. It was lengthened and updated from the DC-9. This series can seat from 130 to 172 passengers depending on variant and seating configuration.

The MD-80 series was introduced into commercial service on October 10, 1980 by Swissair. The series includes the MD-81, MD-82, MD-83, MD-87, and MD-88. These all have the same fuselage length except the shortened MD-87.

The series was followed into service in modified form by the MD-90 in 1995 and the Boeing 717 (originally MD-95) in 1999.

Aircraft	Code	Max Pax	Cruise Speed	Ceiling	Engine	Range	Fleet Count
Airbus A319-100	A319	156	541kts	41,000ft	CFM56-5B, 68.3 in (1.73 m) fan IAE V2500A5, 63.5 in (1.61 m)	3,750nm	38	more info
Airbus A320-200	A320	186	470kts	41,000ft	CFM56-5B, 68.3 in (1.73 m) fan IAE V2500A5, 63.5 in (1.61 m)	3,300nm	64	more info
Boeing 757-200	B757	200	573kts	38,000ft	Pratt & Whitney PW2037/PW2040; Rolls-Royce RB211-535	2,460nm	6	more info
McDonnell Douglas MD-80	MD80	155	499kts	37,000ft	Pratt & Whitney JT8D-217A	2,051nm	61	more info