The new A350-900s will join Japan Airlines's A350 fleet serving international routes, while the A321neo will operate on domestic services within Japan.
Local airlines such as Lion Air Group also plan to open six new routes from YIA to several local airports such as Pontianak and Banjarmasin.
The state-owned airline PT Merpati Nusantara Airlines (Persero) or Merpati Airlines was officially declared bankrupt by the Surabaya Commercial Court
Tickets for the Singapore-Bali flight route are already sold through SIA's distribution network.
Indonesia will soon issue regulation that will allow Boeing 737 Max to fly again within its airspace, ending a two-year ban.
