Some different ways to fold a paper airplane include the hammerhead airplane method, in which you crease the paper so that the flying tips are at the end of the craft, and the bottlenose airplane method, in which you fold the wing flaps into down dihedral angles. Another way to fold an airplane is to use the manta ray airplane method.
To fold a paper airplane using the hammerhead airplane method, fold the paper in half vertically. Keep the crease to the right, and fold the bottom right corner along the bottom about three fingers' width, almost to the center of the paper. Unfold the paper, and fold both top corners down to the centerfold crease. Fold the point that this creates down to the center crease as well.
Rotate the paper so that the pointed nose is at the top, and fold both top corners down to the center crease again. Fold the small triangular flap up and over the larger flaps above it to lock the larger flaps in place. Flip the paper over, and fold in half along the center crease again. Make the first wing flap crease, and flip the paper over to make the second wing flap crease. Then open up both wings, ensure that the wings are at the same angle, and make the tail straight and even.