UPDATED!

For your attention there are new rules for travelling to Ukraine.

Foreigners:
From now on, foreigners travelling to Ukraine are obliged to have the following documents to cross the border:

• policy (certificate) of compulsory insurance;
• negative PCR COVID-19 test, taken within 72 hours before entering Ukraine. 

Citizens of Ukraine:
All citizens of Ukraine arriving from abroad are subject to self-isolation for 14 days. Exceptions are passengers with a negative PCR 
test taken abroad no more than 72 hours before entering Ukraine.
Please note that self-isolation can be stopped by passing the PCR test upon arrival in Ukraine.
Children under 12 years are not obliged to have PCR testing. 

The relevant decision was approved by the Government of Ukraine in order to further prevention the spread 
of COVID-19.

More details - at the link: https://dpsu.gov.ua/ua/news/uryad-posiliv-umovi-vizdu-v-ukrainu-dlya-podalshogo-zapobigannya-poshirennyu-covid-19/
https://www.kmu.gov.ua/npas/pro-vnesennya-zmin-do-postanovi-kabinetu-ministriv-ukrayini-vid-9-grudnya-s70421