Uncomfortable chair position for sleeping, not everyone can sleep sitting.
Some airplanes are very small distance between the seats that will not be convenient to fat people, especially during the long flight.
Though it is the safest form of transport, but still there is a risk that the aircraft may occur problems, and these problems can lead to disastrous results.
Very often the flight is transferred to another time or another day due to weather conditions.
The high cost of the ticket.
The absence of physical barriers. no rivers, mountains, pits and so on will not interfere with your journey.
Fly a plane is very safe. Before each flight inspect the plane and out, to avoid accidents.
Great service.
Travelling by plane is very comfortable.
It is the fastest mode of moving from one point to another.