Polish government few days ago announced flight ban from many countries, including Croatia as well. Today, reversion of flight ban to Croatia, flights between two countries can run normally.
LOT Polish Airlines will continue to operate flights from Poland to 5 airports in Croatia in September this year:
the Warsaw - Zagreb route, daily flight available,
the Warsaw - Rijeka route, once per week, every Sunday (until September 13th),
the Warsaw - Split route, once per week, every Sunday,
the Warsaw - Zadar route, once per week, every Saturday,
the Rzeszów - Zadar route, once per week, every Saturday (until September 19th),
the Warsaw - Dubrovnik route, 4 times per week (Mon, Wed, Thu, Sat),
the Krakow - Dubrovnik route, once per week, every Saturday.
The airline planned to operate regular flights between Budapest and Dubrovnik in September as well, but due to the Hungarian border closure, operation of those flights is not possible anymore so LOT was forced to cancel all planned departures on this route.