The choice of route depends on the starting point of your trip. From Odessa, Chernivtsi, for example, there are convenient flights to Italy from Romania and Moldova. If your trip starts from Transcarpathia, a convenient option is Budapest, but for most people it will be convenient to fly from cities in Poland: Warsaw, from where there are the most flight options, Rzeszow - the closest airport to the border, or Krakow, from where you can always find the cheapest tickets.
For your convenience and to choose the most comfortable route, we have made a Guide to traveling abroad and also collected information about all airports near Ukraine: "Airports near Ukraine: how to get there and where to fly to".