The deal, which Garuda secured after most of its creditors voted to approve its restructuring proposal last week, was supposed to be ratified in a meeting on Monday.
"The two creditors objected to the method and the calculation of the claims," a court-appointed administrator for the case, Martin Patrick Nagel, told Reuters.
Two Ireland-based aircraft lessors, Greylag Goose Leasing 1410 and 1446, had objected to the court-verified amount of their claims against Garuda, Nagel said.
The administrators had accepted a combined total of around 2.3 trillion rupiah ($155.09 million) in claims from the two lessors, according to a debt list document dated on June 14.
Nagel said they wanted the court to recognize 5.99 trillion rupiah ($403.91 million) worth of claims.
The panel of judges said it needs time to study the creditors' request, he added.
Garuda and a lawyer for the lessors did not immediately respond to request for comment.
($1 = 14,830.0000 rupiah)
(Reporting by Stefanno Sulaiman; Editing by Gayatri Suroyo)