AIRPLANE: The American Sign Language (ASL) sign for "airplane"

 

For "AIRPLANE" use a small double motion.  You move the hand forward just a couple inches or so, then bring it back, then move it forward again.  Make sure to angle the palm down a bit so you aren't just signing "I LOVE YOU."

 

You can also sign AIRPLANE to show the movement of FLYING:

Note: The sign "AIRPLANE" when used in context can be interpreted as "AIRFORCE."

Notes: 

Also see: ► FLY

Also see: ► PILOT