Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Indonesia to Armenia as you normally would.
Related info for your journey
Useful info, stats and facts about Indonesia to Armenia flights.
This is defined as Denpasar Bali Ngurah Rai Airport (DPS) and Yerevan Airport (EVN). Codes like Yerevan Airport are often used to just call airports uniquely. Jakarta Soekarno-Hatta Intl Airport (CGK), Surabaya Juanda Airport (SUB), Medan Kuala Namu Intl Airport (KNO), Praya Lombok Intl Airport (LOP), Yogyakarta Intl Airport (YIA) are other airports near this flight route and their unique identifiers/IATA codes.