One of the reason could be due to the flight being operated during the National Day long weekend (17 August) which is a popular time for Indonesians to visit Bali.
However what makes this special itinerary worth covering is that the flight is served by Garuda Indonesia’s flagship plane – Boeing’s 777-300ER instead of the 737-800 that is normally used on this route. Jakarta to Denpasar Bali is perhaps one of the most common trip reports involving Garuda Indonesia and I have reviewed this exact trip before.