The operator of the Indonesian capital's main airport has apologized to passengers for flooding at its brand new terminal after rains overcame drainage pipes and inundated the arrivals area on Sunday.

The $560 million terminal opened last week to domestic flights by national carrier Garuda. But the terminal has been plagued by complaints about its lack of readiness.

The airport operator and government hope the new terminal, and a third runway that is under development, will relieve over-crowding at Soekarno-Hatta airport and make Jakarta a rival to Singapore and Bangkok for international stopovers in Southeast Asia.