Airspace West and East of Russia effectively blocked now. Surprisingly the US has not closed its airspace to Russian flights. Russia has enacted retaliatory bans of course.
This also means that a lot of international flights are going to have take the long way around for most carriers. Not that a lot of us are travelling with Covid still being an issue, but when we can, I expect the environment to be a lot different with more refueling points or longer flight times since most countries can't transit over Russia now.
https://twitter.com/user/status/1498374801689350150