

Belarus did this a few years ago with a flight from somewhere else to Lithuania that was carrying a Belarusian dissident. The few minutes it spent in Belarusian airspace was enough for the air force to intercept it, force it to land and arrest the dissident.
IIRC, there was a huge outrage, which didn’t help the dissident (rogue states gonna go rogue and all that), but since then, no EU/western flights have overflown Belarus.
They should also make plans to fund a Radio Free America, for once the corporate US press starts fully parroting the party line.