From the Heritage Foundation, surprisingly (or maybe not, I don't follow them closely but remember they were major backers of the Iraq war, aka the greatest disaster ever to befall US foreign policy):
In the aftermath of Secretary of State Hillary Clinton’s trip to Turkey last weekend, there has been speculation that the U.S. might support the idea of establishing a no-fly zone (NFZ) over Syria. Under the current conditions, an establishment of an NFZ would be a costly and risky action that would do little to stop the killing on the ground while entangling the U.S. in an intensifying civil war.
In the conclusion they end with the zinger, "The U.S. Air Force is not for hire every time there is a popular uprising somewhere in the world."
They have other recommendations that are more along the lines along what might one expect, i.e. creating of coalition of powers "interested in a post-Assad government that does not export terrorism and pander to Iran", providing "non-lethal aid" and "providing covert weaponry only after it has identified reliable, effective, and non-Islamist local commanders who can provide ironclad guarantees that the arms will not fall into the hands of terrorists." Sounds easy, right?