Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Jakarta to Riga as you normally would.
Related info for your journey
Useful info, stats and facts about Jakarta to Riga flights.
If you book a flight to Riga from Jakarta, you will be flying to Riga Intl, which is the city’s only airport. Riga Intl (RIX) is located 8.7 km from the centre of Riga. There are 0 flights from Jakarta to Riga Intl per day from 0 different airlines.
This is defined as Jakarta Soekarno-Hatta Intl Airport (CGK) and Riga Intl Airport (RIX). Codes like Riga Intl Airport are often used to just call airports uniquely.