4 ms·
This is the real reason. The 757 could cruise at Mach 0.8, but it's a lot less efficient at that speed. The 757 use to make the SFO-JFK route in a little under
by spaceflunky 10y ago
This is the real reason. The 757 could cruise at Mach 0.8, but it's a lot less efficient at that speed.
The 757 use to make the SFO-JFK route in a little under 5 hours, these days most flights make it in just under 6 (a 20% increase in time to save fuel).
Air travel is technically capable of big improvements, but economics don't work out.
- nradov 10y agoNonstop SFO-JFK flights are 5:35 to 5:48. But this isn't all due to flying slower. Airlines have increased their scheduled flight times to improve their on-time arrival statistics. So if there are no delays then they actually arrive early.