What happens if you fly a plane too high?
Mia Moss
Published Jan 14, 2026
If a passenger jet flies too high, it reaches a point called 'Coffin Corner'. This is the point at which the aircraft's low speed stall and high-speed buffet meet and the plane can no longer maintain its altitude which forces it to descend.
What is the maximum height a flight can fly?
Question: What is the highest altitude an airplane can fly? Answer: The highest commercial airliner altitude was 60,000 feet by Concorde. The highest military air-breathing engine airplane was the SR-71 — about 90,000 feet. The highest airliner flying today reaches 45,000 feet.Why do planes do not fly over the Pacific?
Flying over the Pacific Ocean is avoided by most airlines for most flights because it usually doesn't make sense to fly over it when shorter and safer routes exist. The Pacific Ocean is also more remote and less safe than the Indian and Atlantic Oceans to fly over, resulting in a higher chance of a plane crashing.Do you travel faster if you fly higher?
But a common questions is, do airplanes fly faster at higher altitudes? Technically, no. As altitude increases, air density decreases, which decreases engine performance but gives it better fuel efficiency.Why is it better for planes to fly higher?
The higher you fly, the more efficient it isJet engines are more efficient when operating at their maximum RPM or exhaust temperature limits. The engines produce less thrust as the plane gains altitude because the air is thinner. This means that the aircraft can fly much faster while burning less fuel.
What happens if an aircraft climbs too high?!
Do planes fly over Mount Everest?
Tim Morgan, a commercial pilot writing for Quora says aircraft can fly above 40,000 feet, and hence it is possible to fly over Mount Everest which stands at 29,031.69 feet. However, typical flight routes do not travel above Mount Everest as the mountains create unforgiving weather.Can you breathe at 35000 feet?
Whether you are flying aboard a small Cessna or a jumbo-sized Airbus A380, you can breathe freely inside the cabin without wearing a mask or respirator. Even at a cruising altitude of 35,000 feet, you shouldn't have trouble breathing.Why do private jets fly so high?
There are three reasons why private jets fly at such high altitudes: to avoid traffic, weather avoidance, and to fly faster.How high can jet fighters fly?
Most fighter jets fly at an altitude between 45,000-51,000 feet, but some like the F-22 Raptor can fly as high as 65,000 feet by being able to ascend vertically. In conclusion, most commercial planes fly at altitudes between 30,000-42,000 feet, but private jets and military aircraft can fly higher.Why do commercial planes fly so high?
Air resistance and fuel efficiencyOne of the main reasons commercial airplanes fly so high is air resistance. You see, the higher you go above the ground, the thinner the atmosphere becomes, and therefore, the less resistance there is on the movement of the plane.