I doubt that the land borders will remain open and easy to traverse. It’s likely that this is the beginning of an escalation on both sides.

Beyond that, Poland may be bordering Belarus, but Poland is a huge country. Berlin to Minsk is 1,100 km, a 12-13 hour bus ride at minimum. Add a 2-3 hour wait at the border to be realistic. This all adds up to a much longer trip than a 1-2 hour flight. Especially for immigrants that are probably visiting home for a weekend trip and can’t afford to waste 3 days just on traveling.

I know. Pre-war Czechoslovakia was a long noodle and people from Carpathian Ruthenia (a region annexed by the USSR in 1945 and attached to Ukrainian SSR) still come to Prague to work. They usually take buses from Uzhhorod to Prague (750 km), the journey lasts about 13 hours.

Yeah, no one does a weekend hop to family and back under such conditions. Visits are monthly.

Warsaw to Minsk buses take about 12 hours too. But the ticket is cheap, about 20 eur. I don't think you can buy an air ticket under 100 eur. Perhaps even much more (150-200).

Given that a lot of the people work for peanuts, they choose the far cheaper option even if it means a much longer and uncomfortable journey.