Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Abu Dhabi to Kharkiv as you normally would.
Within the past month, 11 users have taken a look at flights from Abu Dhabi Intl to Kharkiv Intl.
This is defined as Abu Dhabi Intl Airport (AUH) and Kharkiv Intl Airport (HRK). Codes like Kharkiv Intl Airport are often used to just call airports uniquely.