There is literally no chance of Patel being leader. She is lucky to still have a job.The problem with banning flights is that it is both politically incorrect, it can be interpreted as racist or xenophobic, and it goes against the Neo-Liberal/Globalist trends that now dominate Western European countries. Freedom of movement is one of the pillars of our current societies. Go against that and all sorts of problems and delays seem to crop up. The system will work against it.
The Conservative Party in the UK doesn't dare to ban flights from one or more countries until the commentariat are almost screaming at them to do so. If they ban flights too early then they will be accused of racism and/or xenophobia. Also, most of the people in charge in government in the UK aren't exactly hardcore Brexiteers and/or against freedom of movement. They are in fact rather soft and wet. They don't have the confidence to do the right thing, simply because they are afraid of being called racists and "far right" by the people who get airtime on the BBC. Both Boris, Gove and Raab come to mind.
Patel might be a different case. She would probably be quicker at banning flights and not be too bothered about the left wing onslaught. The Home office really thickens one skin.
I suspect there will be a leadership challenge in a few months time. That'll be a bit of political drama to look forward to. I hope Patel wins.
Anyone supporting her and her politics is for the watching.