I just wanted to know what does Newton,s third law have to do with flight

Please help

"For every action, there is an equal and opposite reaction."

Have a look here:http://www.glenbrook.k12.il.us/gbssci/phys/Class/newtlaws/u2l4a.html
And have a think about an aeroplane.

Thanks but I also read this about Newtons Third law so I am confused Mass and Energy are interchangeable, and vice-versa.

For every action there is an equal but opposite reaction

It isn't exactly about mass and energy it is about saturdays answer, read on:

Sir Isaac Newton first presented his three laws of motion in the "Principia Mathematica Philosophiae Naturalis" in 1686. His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A. Notice that the forces are exerted on different objects.

For aircraft, the principal of action and reaction is very important. It helps to explain the generation of lift from an airfoil. In this problem, the air is deflected downward by the action of the airfoil, and in reaction the wing is pushed upward. Similarly, for a spinning ball, the air is deflected to one side, and the ball reacts by moving in the opposite direction. A jet engine also produces thrust through action and reaction. The engine produces hot exhaust gases which flow out the back of the engine. In reaction, a thrusting force is produced in the opposite direction.

You can access this information to if you know what to look for in Google. Are you doing this for your son or daughter's homework for school ? If you are they will learn a lot more if they look this up themselves.

Mass and energy being interchangeable is Einstein's law E=mc^2, nothing to do with Newton.