This is a paper airplane I just learned the design for.
The photo below is the finished product!
(I hope I didn't plagerize anyone"s ideas.)

Step 1: Materials

You need 1 sheet of paper.
(It doesn't matter what size, just needs to be a square or rectangle-shaped piece of paper)

Step 2: Time to Start Folding!

Now take the top-right corner down to be parallel with the right side of the paper
Look at the picture for more info.
Then, unfold.

Step 3: Next Fold☺

Now, take the top-left corner to be parallel with the right side of the paper
Again, look at pic 2.
Unfold.

Step 4: Fold Down and Form "House"

Okay the name pretty much says what to do..
The fold edge (the edge furthest down) should be touching the base of the "X"
Now, you should see that the nds can be pushed in.
Push them in.
{Look at Picture 2 if done incorrectly}

Step 5: Origami Helps Here☺

Okay, if you notice, there is a triangle staring you in the face.
Take the ends of that triangle, bring them up to the nose ( the top).

Step 6: Next "Origami Step"

Now, take the points of the triangle [the loose ends] and fold them to the middle.

After that, you will notice (at the front) you will see pockets, open the pockets. Tuck the top two flaps into those flaps.