Primary sources · 4
- [1] Boeing product pages — Manufacturer-published cruise Mach and speed figures for 737, 747, 777, 787 · boeing.com · Current https://www.boeing.com/commercial/
- [2] Airbus product pages — Manufacturer-published cruise Mach for A220, A320 family, A330, A350, A380 · aircraft.airbus.com · Current https://aircraft.airbus.com/en/aircraft
- [3] Embraer E-Jets product pages — E175, E190, E195 cruise specifications · embraercommercialaviation.com · Current https://www.embraercommercialaviation.com
- [4] International Civil Aviation Organization Annex 6 — Reference on commercial-flight operating standards including cruise definitions · ICAO · Current https://www.icao.int/safety/airnavigation/Pages/aig.aspx
Almost every commercial passenger jet in service cruises somewhere between Mach 0.74 and Mach 0.86 — a narrow band that reflects shared aerodynamic trade-offs, not a coincidence. Narrow-body single-aisles hold the lower end, wide-bodies the upper end, and the regional jets bracket both.
The dozen aircraft that fly most of the world
Roughly 80 % of global passenger-kilometres are flown on the twelve aircraft families listed below. The A320 and 737 dominate the narrow-body market; the 787, A350, and 777 dominate intercontinental wide-body service. Regional jets (E-Jets, CRJ, ATR) own short-haul markets that the narrow-bodies cannot economically reach.
| Aircraft | Class | Cruise Mach | Cruise km/h | Cruise mph |
|---|---|---|---|---|
| Airbus A220-300 | Narrow-body | 0.78 | ≈ 833 | ≈ 518 |
| Airbus A320neo / A321neo | Narrow-body | 0.78 | ≈ 833 | ≈ 518 |
| Boeing 737-800 | Narrow-body | 0.789 | ≈ 842 | ≈ 523 |
| Boeing 737 MAX 8 | Narrow-body | 0.79 | ≈ 842 | ≈ 523 |
| Embraer E195-E2 | Regional jet | 0.78 | ≈ 833 | ≈ 518 |
| Bombardier CRJ-900 | Regional jet | 0.78 | ≈ 830 | ≈ 516 |
| Airbus A330-300 | Wide-body twin | 0.82 | ≈ 871 | ≈ 541 |
| Boeing 777-300ER | Wide-body twin | 0.84 | ≈ 905 | ≈ 562 |
| Boeing 787-9 | Wide-body twin | 0.85 | ≈ 903 | ≈ 561 |
| Airbus A350-900 | Wide-body twin | 0.85 | ≈ 903 | ≈ 561 |
| Boeing 747-400 | Wide-body quad | 0.85 | ≈ 920 | ≈ 572 |
| Airbus A380 | Wide-body quad | 0.85 | ≈ 900 | ≈ 559 |
Why Mach 0.78 vs Mach 0.85
Cruise speed selection is a fuel-burn-versus-time trade. At the same altitude, increasing speed costs proportionally more drag once the aircraft enters the transonic regime above about Mach 0.78. Narrow-body designs optimise for fuel cost per available seat kilometre, so they sit right below the transonic-drag rise. Wide-bodies have higher daily utilisation pressure and longer routes where the per-trip time saving matters more, so they accept the higher fuel burn of Mach 0.85.
Mach number is not km/h
Mach number is the ratio of true airspeed to the local speed of sound, which depends on air temperature. At sea level the speed of sound is about 340 m/s (1,225 km/h); at typical cruise altitude (FL370, −55 °C) it falls to about 295 m/s (1,062 km/h). So Mach 0.85 at FL370 is about 903 km/h, while at sea level the same Mach would be 1,041 km/h — faster in absolute speed but at the same fraction of the local sound speed.
The faster planes are getting older
The 777-300ER and 747-400 sit at the top of the cruise-speed table — both are older designs with higher cruise speeds because the fuel-cost calculus of the 1990s was different. The newest aircraft (A350, 787, A220, A321neo) all bring cruise speed back down a touch in exchange for measurably lower fuel burn per ASK. Cruise speed has peaked.