...Besides not even all the USAF transports (C5,C141,C17) have that cabability.
Furthermore, shoulder launched surface to air missles could easily be substituted with more readily available 50 caliber machine guns. Near an airport perimeter, suicidal terrorists could put enough holes into the wet wing of a departing jet to cause structural failure or to trigger a probable fuel tank explosion.
It would be cheaper if concerned civilized nations would get together and collectively infiltrate terrorist organizations with agents and kill them from the inside out. And, to be sure, it would be cheaper than sending a $1 Million cruise missle into a $100 tent.