On November 23, 2018 I had a flight from KRK (Krakow, Poland) to KBP (Kiev, Ukraine) via Ryanair, flight no. FR 6640. The flight was canceled due to bad weather conditions on KBP airport. Now, I'd like to submit for a flight compensation basing on EU261 and I'm looking for more information on the flight statuses that day/time at given airport, i.e. KBP.
How to find a historical and free of charge data of flight statuses per airport? I was looking for such data but ended up with paid options.
EDIT: This is not a duplicate of Where can I find historical data on arrival and departure times of a particular flight? The mentioned question asks about particular flight and that one is about airport. Also, sources given in the accepted answer provides paid historical data. The 3rd link is a non-existing page.