Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Bangkok to Ukraine as you normally would.
Related info for your journey
Useful info, stats and facts about Bangkok to Ukraine flights.
These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Bangkok Suvarnabhumi Airport to Kyiv Zhuliany Intl Airport flight would often be abbreviated as a BKK to IEV flight. Ready for more IATA code knowledge? These are related airports for your current travel destination: Kyiv Boryspil Intl Airport (KBP), Lviv Danylo Halytskyi Intl Airport (LWO), Odesa Intl Airport (ODS), Kharkiv Intl Airport (HRK), Dnipro Dnepropetrovsk Airport (DNK).