The UK has punished Belarus for arresting Roman Protasevich
by forbidding Belarus's airline from flying to the UK and ordering
British planes not to fly over Belarus.
That is a substantial step, but I think it is inadequate. At the very
least, other countries should ban any flights between their airports
and Belarus — regardless of which airline — and ban flights from or
to Belarus from crossing their airspace. This would cut off Belarus from
air transportation with anywhere except Russia.
As a separate matter, they should to prohibit flights that have
crossed Belarusian airspace from entering their airspace. That would
would not punish Belarus any further, but it would make all flights
avoid the territory of Belarus, and that would ensure the safety of
passengers in those flights.
Belarus is not the only country which interfered with travel in
foreign country's civilian aircraft. When Snowden was seeking a way
to reach Ecuador, and the US wanted to keep him stuck in Russia, the
plane of the president of Ecuador went to Europe. The US suspected it
would bring Snowden to Ecuador on its return there, and had its allies
compel the plane to land in a country which then forcibly searched it.
Fortunately, Snowden was not aboard.
They did not threaten violence against the Ecuadorian plane or order
it to land at a specific place. But they did box it in by forbidding
it to enter various countries' airspace. And they likewise compelled
Ecuador to allow it to be searched.
It would be a mistake to draw blanket conclusions about the US
government or the Belarus government from this. Each one is capable
of doing evil. Lukashenko's regime is unremitting tyranny and
unremitting evil; the US has some hope of being better.