Originally Posted by
7free
Why the need to use Garuda to T3 when you have the option to use AirAsia that arrives in T2F? You then only need to walk to T2D/E to check in. No need to use the shuttle bus or taxi.
This is what I would do but the OP is flying in June. Garuda wants to move international operations to T3 by the start of May (which might not actually materialize).
http://jakartaglobe.id/news/garuda-moves-international-flights-to-terminal-3-soekarno-hatta-airport-by-may/