Air Serbia flew from Belgrade to Kyiv Monday, renewing a route dropped three years ago. The return of flights to the largest city in the Balkans is part of a mini-boom in flights to the long-overlooked region. This summer, Windrose has flights from Kyiv to Pula, Croatia and to Tivat, Montenegro. SkyUp has seasonal charters to Tivat; Tirana, Albania; and, starting Thursday, to Split, Croatia. This spring Ryanair and Wizz Air launched flights from Kyiv to Athens, competing with UIA. Ten days ago, Wizz Air launched flights from Kyiv Sikorsky to Thessaloniki, northern Greece.