When flying from Jakarta to Najaf, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Najaf Al Najaf Intl (NJF) is the airport you will fly into if you book a flight from Jakarta to Najaf. You should not have trouble finding flights to Al Najaf Intl from Jakarta; the airport handles an average of 0 inbound flights from Jakarta per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the Najaf airport from Jakarta. It is only a 6.6 km journey from Al Najaf Intl (NJF) to Najaf’s city centre.
These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Jakarta Soekarno-Hatta Intl Airport to Najaf Al Najaf Intl Airport flight would often be abbreviated as a CGK to NJF flight.