Pteromerhanophobia

Fear of flying is a fear of being on an airplane (aeroplane), or other flying vehicle, such as a helicopter, while in flight. It is also referred to as flying phobia, flight phobia, aviophobia or aerophobia (although the last also means a fear of drafts or of fresh air).

Fear of flying may be a distinct phobia in itself, or it may be an indirect combination of one or more other disorders, such as claustrophobia (a phobia of being restricted, confined, or unable to escape) or acrophobia (anxiety or dread of being at a great height). It may have other causes as well, such as agoraphobia (especially the type associated with having a panic attack in a place they can't escape from). It is a symptom rather than a disease, and different causes may bring it about in different individuals.

This phobia receives more attention than most other phobias because air travel is often difficult for people to avoid—especially in professional contexts—and because it is common, affecting a significant minority of the population. Inability to maintain emotional control when aloft may prevent a person from going on vacations or visiting family and friends, and it can cripple the career of a businessperson by preventing them from traveling on work-related business.

Anticipatory anxiety of being out of control and overwhelmed can prevent a person from planning to travel by air. The thought of an upcoming flight can cause great distress, particularly when compelled to travel by air. The most extreme manifestations can include panic attacks or vomiting at the mere sight or mention of an aircraft or air travel.

The fear of flying may be created by various other phobias and fears:

In some cases, education can considerably diminish concern about physical safety. Learning how aircraft fly, how airliners are flown in practice, and other aspects of aviation can reduce anxiety. Many people have dealt with the problem by learning to fly or skydive, effectively removing their fear of the unknown. Some educate themselves; others attend courses offered by pilots or airlines.

Though education plays an important role, the knowledge that turbulence will not destroy the aircraft does not stop the amygdala - the part of the brain responsible for generating most emotional responses, and via the Hypothalamic–pituitary–adrenal axis, the release of stress hormones - from reacting. In turbulence, repeated downward movements of the plane trigger one release of stress hormones after another. A build-up of stress hormones can cause a person to be terrified despite having every reason to know logically that the plane is not in danger. In such cases, therapy — in addition to education — is needed to prevent the release of stress hormones so that the anxious flier may gain relief.

...
Wikipedia