There are no flights nor direct trains. I had to take a bus to Minsk (capital of Belarus) and then a train to Moscow to go "there" and then a bus to Brest (also Belarus) and a bus to Warsaw to go back. Big queues on borders. Met a lot of Ukrainians on the Polish -Belarus border as well (those who have relatives in Russia for example). Talked to them,scary stories..a lot are those from the Eastern Ukraine, one woman showed me her burned house and car..
In general,it takes around 24 hours to go from Poland to Russia now,and in Belarus most of cards (Russian "Mir" and my Polish Visa/MasterCard) don't work...only revolut worked for me,so I was able to buy train tickets and food/water there, without this card I wouldn't be able even to buy train tickets
Plus,a lot of other problems