Bing found the following results
Cheap Flights to Kostanay | Skyscanner
$493 Cheap Flights to Kostanay - Earn miles plus OneKeyCash
Flights to Kostanay (KSN) - FlightConnections
Cheap flights to Kostanai, Kazakhstan
Cheap Flights to Kostanay Province from $1,418 | Skyscanner
Cheap flights to Kostanay | Kiwi.com
Cheap flights to Kostanay | Kiwi.com
Cheap Flights to Kostanay | Skyscanner
Cheap Flights to Kostanay (KSN) from £744 Return | Skyscanner
Cheap Flights to Kostanai - KAYAK