No fly zone is a fiction. Those were not legal and the UN didn't create any. If some hostile foreign country flew over our air space, we'd shoot 'em down too.
"One White House official with knowledge of the conversations told me that the Russian ambassador raised the sanctions to Flynn and that Flynn responded that the Trump team would be taking office in a few weeks and would review Russia policy and sanctions. Thatís neither illegal nor improper." ~ Bloomberg
When do we get to see the transcript? Flynn, being in espionage, had to know his call was being recorded too.