Being afraid to fly is completely normal, as some passengers may have experienced a traumatic event in the past.
There are ways to keep calm on a plane, like packing a goody bag or even taking a deep breath.
In most cases, theres nothing you should worry about on a flight as pilots know what they're doing.
But what does it mean when you hear this noise?
“[Worry] if you hear all the engines stop making noise”
The travel experts and engineers from US knowledge sharing site Quora have revealed the one sound you should worry about.
If the engines are silent this means that they have malfunctioned and an emergency landing may be required.
Engineer Dave Lindbergh wrote: “[Worry] if you hear all the engines stop making noise.
“If this happens, it means the plane must land very soon (it can glide, but not forever).
“If the pilots cant reach an airport in time (or get at least some of the engines restarted), youre in for a forced landing.”
Meanwhile, another private pilot Jim Abraham has reassured that “no aircraft ever plummets when the engine stalls”.
He wrote on Quora: “If you were flying in a 747 and all engines suddenly stalled – or ran out of fuel or were switched off – the plane would not plummet out of the sky.
“All airplanes can glide, meaning they can travel a certain amount forward for every foot they descend.
“Nothing [will happen when the plane stalls]. If your pilot knows what to do, hell release back pressure on the controls, wait for the plane to un-stall, then slowly increase back pressure until the plane comes to a stable attitude.
“If you're in an airplane and the engines die on you, you are not going to plummet to your death.
“If your pilot knows what he or she is doing, you're instead going to glide, as far as possible, to the best landing area you can find.”
Previously, we revealed the truth about landing a plane at night.
Writing in his book “How to Land a Plane”, author Mark Vanhoenacker explained the troubles hes faced as a pilot.
He said: “Most of us think of airports as quite well-lit places and its true that the apron areas around the terminal buildings are often brightly illuminated.
“But taxiways and runways are so subtly lit that picking out an airfield at night, especially in an urban landscape often involves looking for a particularly dark spot.
“Close in, thankfully the approach and runway lights are unmistakable.”